CBSE Class 10 Maths Standard 2025 Question Paper 30/4/3 with Solutions
All 44 questions from the CBSE Class 10 Mathematics Standard board paper, Set 30/4/3 (2025),
with answers and step-by-step solutions. Total 80 marks. Tap “Show answer & solution” under any question.
A 30 m long rope is tightly stretched and tied from the top of pole to the ground. If the rope makes an angle of 60∘ with the ground, the height of the pole is :
On the top face of the wooden cube of side 7 cm, hemispherical depressions of radius 0.35 cm are to be formed by taking out the wood. The maximum number of depressions that can be formed is :
The cumulative frequency for calculating median is obtained by adding the frequencies of all the :
(A)classes up to the median class
(B)classes following the median class
(C)classes preceding the median class
(D)all classes
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Answer: (C) classes preceding the median class
In the median formula, cf is the cumulative frequency of the class preceding the median class, i.e. the sum of frequencies of all classes before the median class.
Letters A to F are mentioned on six faces of a die such that each face has a different letter. Two such dice are thrown simultaneously. The probability that vowels turn up on both the dice is :
The number of red balls in a bag is 10 more than the number of black balls. If the probability of drawing a red ball at random from this bag is 53, then the total number of balls in the bag is :
Assertion (A) : Tangents drawn at the end points of a diameter of a circle are always parallel to each other. Reason (R) : The lengths of tangents drawn to a circle from a point outside the circle are always equal.
(A)Both, Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
(B)Both, Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
(C)Assertion (A) is true but Reason (R) is false.
(D)Assertion (A) is false but Reason (R) is true.
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Answer: (B) Both, Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
A: each tangent is perpendicular to the same diameter, so the two tangents are parallel. A is true.
R is a true theorem (equal tangent lengths), but it is not the reason for A, which uses tangent ⊥ radius.
Assertion (A) : Unit digit of 3n cannot be an even number for any natural number n. Reason (R) : 2 is not a prime factor of 3n for any natural number n.
(A)Both, Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
(B)Both, Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
(C)Assertion (A) is true but Reason (R) is false.
(D)Assertion (A) is false but Reason (R) is true.
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Answer: (A) Both, Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).
3n has only the prime factor 3 (uniqueness of prime factorisation), so 2 is not a factor: R is true.
A number with an even unit digit is divisible by 2. Since 2 does not divide 3n, its unit digit is odd: A is true and follows from R.
A 1.5 m tall boy is walking away from the base of a lamp post which is 12 m high, at the speed of 2.5 m/sec. Find the length of his shadow after 3 seconds.
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Answer:1415 m (about 1.07 m)
Distance walked in 3 s =2.5×3=7.5 m
Let the shadow be s m. The boy and the lamp post are both vertical, so the two right triangles formed with the tip of the shadow are similar (AA).
Find the coordinates of the point C which lies on the line AB produced such that AC=2BC, where coordinates of points A and B are (−1,7) and (4,−3) respectively.
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Answer:C(9,−13)
C lies on AB produced beyond B and AC=2BC, so AB=AC−BC=BC: B is the mid-point of AC.
Renu and Simran were born in the year 2000 which is a leap year. Find the probability that : (i) both have same birthday. (ii) both have different birthdays.
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Answer: (i) 3661 (ii) 366365
A leap year has 366 days. Whatever Renu's birthday is, Simran's can be any of 366 equally likely days.
P(x,y), Q(−2,−3) and R(2,3) are the vertices of a right triangle PQR right angled at P. Find the relationship between x and y. Hence, find all possible values of x for which y=2.
Let x and y be two distinct prime numbers and p=x2y3, q=xy4, r=x5y2. Find the HCF and LCM of p, q and r. Further check if HCF(p,q,r)×LCM(p,q,r)=p×q×r or not.
The perimeter of a rectangle is 70 cm. The length of the rectangle is 5 cm more than twice is breadth. Express the given situation as a system of linear equations in two variables and hence solve it.
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Answer:l+b=35, l−2b=5; length =25 cm, breadth =10 cm
The corresponding sides of △ABC and △PQR are in the ratio 3 : 5. AD⊥BC and PS⊥QR as shown in the following figures : (i) Prove that △ADC∼△PSR (ii) If AD=4 cm, find the length of PS. (iii) Using (ii) find ar(△ABC) : ar(△PQR)
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Answer: (i) Proved. (ii) PS=320 cm (iii) 9:25
(i) △ABC∼△PQR (sides proportional), so ∠C=∠R.
In △ADC and △PSR: ∠ADC=∠PSR=90∘ and ∠C=∠R, so △ADC∼△PSR (AA).
State basic proportionality theorem. Use it to prove the following : If three parallel lines l, m, n are intersected by transversals q and s as shown in the adjoining figure, then BCAB=EFDE.
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Answer: Statement given; Proved.
BPT: If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, the other two sides are divided in the same ratio.
Proof of BPT: In △ABC let DE∥BC with D on AB, E on AC. Join BE and CD; draw EN⊥AB, DM⊥AC.
ar(BDE)ar(ADE)=21DB⋅EN21AD⋅EN=DBAD and ar(DEC)ar(ADE)=ECAE
△BDE and △DEC are on the same base DE between the same parallels DE and BC, so ar(BDE) = ar(DEC). Hence DBAD=ECAE.
Application: Join AF, cutting line m at G.
In △ACF, BG∥CF (as m∥n), so by BPT BCAB=GFAG ... (1)
In △FAD, GE∥AD (as m∥l), so by BPT GAFG=EDFE, i.e. GFAG=EFDE ... (2)
A bat manufacturing company made a huge bat for charity and got it signed by world cup winning team. The dimensions of the bat which is in the form of a cuboid with a cylindrical handle at the top are as follows : length = 2 m, width = 0.5 m, thickness = 0.1 m diameter of cylindrical part = 0.1 m height of cylindrical part = 0.7 m Find the volume of wood used in the bat. Also, find the total surface area of the wooden bat.
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Answer: Volume =0.1055 m3; total surface area =2.72 m2
Cuboid volume =2×0.5×0.1=0.1 m3
Cylinder: r=0.05 m, h=0.7 m; volume =722×0.05×0.05×0.7=0.0055 m3
Volume of wood =0.1+0.0055=0.1055 m3
TSA of cuboid =2(2×0.5+0.5×0.1+2×0.1)=2(1.25)=2.5 m2
The handle's base covers a circle on the cuboid but its top circle adds the same area, so only the curved surface is extra.
Curved surface of cylinder =2×722×0.05×0.7=0.22 m2
Following table shows the absentees record of 40 students in an academic year : Number of Days: 2-6, 6-10, 10-14, 14-18, 18-22, 22-26, 26-30 Number of Students: 11, 10, 7, 4, 4, 3, 1 Find the 'mean' and the 'mode' of the above data.
The sides of a right triangle are such that the longest side is 4 m more than the shortest side and the third side is 2 m less than the longest side. Find the length of each side of the triangle. Also, find the difference between the numerical values of the area and the perimeter of the given triangle.
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Answer: Sides 6 m, 8 m, 10 m; difference = 0 (area 24, perimeter 24)
Let shortest side =x m; longest =x+4; third side =x+2
A drone was used to facilitate movement of an ambulance on the straight highway to a point P on the ground where there was an accident. The ambulance was travelling at the speed of 60 km/h. The drone stopped at a point Q, 100 m vertically above the point P. The angle of depression of the ambulance was found to be 30∘ at a particular instant. Based on above information, answer the following questions : (i) Represent the above situation with the help of a diagram. (1) (ii) Find the distance between the ambulance and the site of accident (P) at the particular instant. (Use 3=1.73) (1) (iii) (a) Find the time (in seconds) in which the angle of depression changes from 30∘ to 45∘. (2) OR (iii) (b) How long (in seconds) will the ambulance take to reach point P from a point T on the highway such that angle of depression of the ambulance at T is 60∘ from the drone ? (2)
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Answer: (i) Right triangle QPA with QP = 100 m vertical, ambulance at A on the highway, angle of depression 30∘ at Q (ii) 173 m (iii) (a) 4.38 s OR (iii) (b) 23≈3.46 s
(i) Draw QP = 100 m vertical with P on the highway; ambulance at A on the highway; ∠ of depression from Q to A =30∘, so ∠QAP=30∘.
(ii) tan30∘=PAQP⇒PA=1003=173 m
Speed =60 km/h =360060×1000=350 m/s
(iii)(a) At 45∘: distance from P =100 m. Distance covered =173−100=73 m
The Olympic symbol comprising five interlocking rings represents the union of the five continents of the world and the meeting of athletes from all over the world at the Olympic games. In order to spread awareness about Olympic games, students of Class-X took part in various activities organised by the school. One such group of students made 5 circular rings in the school lawn with the help of ropes. Each circular ring required 44 m of rope. Also, in the shaded regions as shown in the figure, students made rangoli showcasing various sports and games. It is given that △OAB is an equilateral triangle and all unshaded regions are congruent. Based on above information, answer the following questions : (i) Find the radius of each circular ring. (1) (ii) What is the measure of ∠AOB ? (1) (iii) (a) Find the area of shaded region R1. (2) OR (iii) (b) Find the length of rope around the unshaded regions. (2)
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Answer: (i) 7 m (ii) 60∘ (iii) (a) (3308+2493) m2≈145.1 m2 OR (iii) (b) 3176 m ≈58.67 m
(i) 2πr=44⇒r=44×447=7 m
(ii) △OAB is equilateral, so ∠AOB=60∘
(iii)(a) Each unshaded region (lens) is made of two congruent segments with chord AB = 7 m subtending 60∘.
Segment area =36060×722×49−43×49=377−4493
Lens area =3154−2493
R1 = circle − lens =154−3154+2493=3308+2493≈102.67+42.44=145.1 m2
(iii)(b) Each lens is bounded by two arcs of 60∘: length =2×36060×44=344 m
There are 4 unshaded regions: total =4×344=3176≈58.67 m
Cable cars at hill stations are one of the major tourist attractions. On a hill station, the length of cable car ride from base point to top most point on the hill is 5000 m. Poles are installed at equal intervals on the way to provide support to the cables on which car moves. The distance of first pole from base point is 200 m and subsequent poles are installed at equal interval of 150 m. Further, the distance of last pole from the top is 300 m. Based on above information, answer the following questions using Arithmetic Progression : (i) Find the distance of 10th pole from the base. (1) (ii) Find the distance between 15th pole and 25th pole. (1) (iii) (a) Find the time taken by cable car to reach 15th pole from the top if it is moving at the speed of 5m/sec and coming from top. (2) OR (iii) (b) Find the total number of poles installed along the entire journey. (2)
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Answer: (i) 1550 m (ii) 1500 m (iii) (a) 480 seconds (8 minutes) OR (iii) (b) 31
Distances of poles from base: 200, 350, 500, ... AP with a=200, d=150
(i) a10=200+9×150=1550 m
(ii) a25−a15=10×150=1500 m
(iii)(b) Last pole is at 5000−300=4700 m: 200+(n−1)150=4700⇒n−1=30⇒n=31 poles
(iii)(a) Counting from the top, the poles are at 300, 450, 600, ... m from the top (a=300, d=150).
15th pole from top is at 300+14×150=2400 m from the top