CBSE Class 10 Maths Standard 2023 Question Paper 30/2/2 with Solutions

If one zero of the polynomial $x^2-3kx+4k$ be twice the other, then the value of k is :

1. (A)$-2$
2. (B)2
3. (C)$\frac{1}{2}$
4. (D)$-\frac{1}{2}$

The ratio in which the x-axis divides the line segment joining the points $(-2,3)$ and $(6,-7)$ is :

1. (A)1 : 3
2. (B)3 : 7
3. (C)7 : 3
4. (D)1 : 2

What is the total surface area of a solid hemisphere of diameter ‘d’ ?

1. (A)$3\pi d^2$
2. (B)$2\pi d^2$
3. (C)$\frac{1}{2}\pi d^2$
4. (D)$\frac{3}{4}\pi d^2$

What is the length of the arc of the sector of a circle with radius 14 cm and of central angle $90^{\circ }$ ?

1. (A)22 cm
2. (B)44 cm
3. (C)88 cm
4. (D)11 cm

If $x=0.3$, is a root of the equation $x^2-0.9k=0$, then k is equal to :

1. (A)1
2. (B)10
3. (C)0.1
4. (D)100

In the given figure, $AB\parallel PQ$. If AB = 6 cm, PQ = 2 cm and OB = 3 cm, then the length of OP is :

1. (A)9 cm
2. (B)3 cm
3. (C)4 cm
4. (D)1 cm

If ‘p’ and ‘q’ are natural numbers and ‘p’ is the multiple of ‘q’, then what is the HCF of ‘p’ and ‘q’ ?

1. (A)$pq$
2. (B)$p$
3. (C)$q$
4. (D)$p+q$

If $△ABC\sim △PQR$ with $\angle A=32^{\circ }$ and $\angle R=65^{\circ }$, then the measure of $\angle B$ is :

1. (A)$32^{\circ }$
2. (B)$65^{\circ }$
3. (C)$83^{\circ }$
4. (D)$97^{\circ }$

The pair of equations $x=a$ and $y=b$ graphically represents lines which are :

1. (A)parallel
2. (B)intersecting at (b, a)
3. (C)coincident
4. (D)intersecting at (a, b)

The area of the triangle formed by the line $\frac{x}{a}+\frac{y}{b}=1$ with the coordinate axes is :

1. (A)$ab$
2. (B)$\frac{1}{2}ab$
3. (C)$\frac{1}{4}ab$
4. (D)$2ab$

In a single throw of two dice, the probability of getting 12 as a product of two numbers obtained is :

1. (A)$\frac{1}{9}$
2. (B)$\frac{2}{9}$
3. (C)$\frac{4}{9}$
4. (D)$\frac{5}{9}$

If ‘$\alpha$’ and ‘$\beta$’ are the zeroes of the polynomial $a{x}^2-5x+c$ and $\alpha +\beta =\alpha \beta =10$, then :

1. (A)$a=5$, $c=\frac{1}{2}$
2. (B)$a=1$, $c=\frac{5}{2}$
3. (C)$a=\frac{5}{2}$, $c=1$
4. (D)$a=\frac{1}{2}$, $c=5$

A bag contains 100 cards numbered 1 to 100. A card is drawn at random from the bag. What is the probability that the number on the card is a perfect cube ?

1. (A)$\frac{1}{20}$
2. (B)$\frac{3}{50}$
3. (C)$\frac{1}{25}$
4. (D)$\frac{7}{100}$

In the given figure, $DE\parallel BC$. If AD = 2 units, DB = AE = 3 units and EC = x units, then the value of x is :

1. (A)2
2. (B)3
3. (C)5
4. (D)$\frac{9}{2}$

If the pair of equations $3x-y+8=0$ and $6x-ry+16=0$ represent coincident lines, then the value of ‘r’ is :

1. (A)$-\frac{1}{2}$
2. (B)$\frac{1}{2}$
3. (C)$-2$
4. (D)$2$

The hour-hand of a clock is 6 cm long. The angle swept by it between 7:20 a.m. and 7:55 a.m. is :

1. (A)${\left(\frac{35}{4}\right)}^{\circ }$
2. (B)${\left(\frac{35}{2}\right)}^{\circ }$
3. (C)$35^{\circ }$
4. (D)$70^{\circ }$

In the given figure, the quadrilateral PQRS circumscribes a circle. Here PA + CS is equal to :

1. (A)QR
2. (B)PR
3. (C)PS
4. (D)PQ

If $\alpha$ and $\beta$ are the zeroes of the quadratic polynomial $p(x)=x^2-ax-b$, then the value of ${\alpha }^2+{\beta }^2$ is :

1. (A)$a^2-2b$
2. (B)$a^2+2b$
3. (C)$b^2-2a$
4. (D)$b^2+2a$

Assertion (A) : The polynomial $p(x)=x^2+3x+3$ has two real zeroes.
Reason (R): A quadratic polynomial can have at most two real zeroes.

1. (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. (C)Assertion (A) is true, but Reason (R) is false.
4. (D)Assertion (A) is false, but Reason (R) is true.

Assertion (A) : If PA and PB are tangents drawn from an external point P to a circle with centre O, then the quadrilateral AOBP is cyclic.
Reason (R): The angle between two tangents drawn from an external point to a circle is supplementary to the angle subtended by the line segment joining the points of contact at the centre.

1. (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. (C)Assertion (A) is true, but Reason (R) is false.
4. (D)Assertion (A) is false, but Reason (R) is true.

The length of the shadow of a tower on the plane ground is $\sqrt{3}$ times the height of the tower. Find the angle of elevation of the sun.

The angle of elevation of the top of a tower from a point on the ground which is 30 m away from the foot of the tower, is $30^{\circ }$. Find the height of the tower.

In the given figure, O is the centre of the circle. AB and AC are tangents drawn to the circle from point A. If $\angle BAC=65^{\circ }$, then find the measure of $\angle BOC$.

If $4{\cot }^{2}45^{\circ }-{\sec }^{2}60^{\circ }+{\sin }^{2}60^{\circ }+p=\frac{3}{4}$, then find the value of p.

If $\cos A+{\cos }^{2}A=1$, then find the value of ${\sin }^{2}A+{\sin }^{4}A$.

Show that the points $(-2,3)$, $(8,3)$ and $(6,7)$ are the vertices of a right-angled triangle.

Prove that $4^n$ can never end with digit 0, where n is a natural number.

Prove that :
$\frac{\sin \theta }{1+\cos \theta }+\frac{1+\cos \theta }{\sin \theta }=2\text{cosec}\theta$

If the system of linear equations
$2x+3y=7$ and $2ax+(a+b)y=28$
have infinite number of solutions, then find the values of ‘a’ and ‘b’.

If $217x+131y=913$ and
$131x+217y=827$,
then solve the equations for the values of x and y.

Find by prime factorisation the LCM of the numbers 18180 and 7575. Also, find the HCF of the two numbers.

Three bells ring at intervals of 6, 12 and 18 minutes. If all the three bells rang at 6 a.m., when will they ring together again ?

In the given figure, O is the centre of the circle and QPR is a tangent to it at P. Prove that $\angle QAP+\angle APR=90^{\circ }$.

If Q(0, 1) is equidistant from P(5, $-3$) and R(x, 6), find the values of x.

Reeti prepares a Rakhi for her brother Ronit. The Rakhi consists of a rectangle of length 8 cm and breadth 6 cm inscribed in a circle as shown in the figure. Find the area of the shaded region. (Use $\pi =3.14$)

A student noted the number of cars passing through a spot on a road for 100 periods each of 3 minutes and summarised it in the table given below. Find the mean and median of the following data.
Number of cars: 0 – 10, 10 – 20, 20 – 30, 30 – 40, 40 – 50, 50 – 60, 60 – 70, 70 – 80
Frequency (periods): 7, 14, 13, 12, 20, 11, 15, 8

Sides AB and BC and median AD of a triangle ABC are respectively proportional to sides PQ and QR and median PM of $△PQR$. Show that $△ABC\sim △PQR$.

Through the mid-point M of the side CD of a parallelogram ABCD, the line BM is drawn intersecting AC in L and AD (produced) in E. Prove that EL = 2BL.

Solve the equation for x :
$1+4+7+10+....+x=287$

The angle of elevation of the top of a tower 30 m high from the foot of another tower in the same plane is $60^{\circ }$ and the angle of elevation of the top of the second tower from the foot of the first tower is $30^{\circ }$. Find the distance between the two towers and also the height of the other tower.

From the top of a tower 100 m high, a man observes two cars on the opposite sides of the tower with angles of depression $30^{\circ }$ and $45^{\circ }$ respectively. Find the distance between the two cars. (Use $\sqrt{3}=1.73$)

Computer-based learning (CBL) refers to any teaching methodology that makes use of computers for information transmission. At an elementary school level, computer applications can be used to display multimedia lesson plans. A survey was done on 1000 elementary and secondary schools of Assam and they were classified by the number of computers they had.
Number of Computers: 1 – 10, 11 – 20, 21 – 50, 51 – 100, 101 and more
Number of Schools: 250, 200, 290, 180, 80
One school is chosen at random. Then :
(i) Find the probability that the school chosen at random has more than 100 computers. (1)
(ii) (a) Find the probability that the school chosen at random has 50 or fewer computers. (2)
OR (ii) (b) Find the probability that the school chosen at random has no more than 20 computers. (2)
(iii) Find the probability that the school chosen at random has 10 or less than 10 computers. (1)

In an annual day function of a school, the organizers wanted to give a cash prize along with a memento to their best students. Each memento is made as shown in the figure and its base ABCD is shown from the front side. The rate of silver plating is ₹ 20 per cm².
Based on the above, answer the following questions :
(i) What is the area of the quadrant ODCO ? (1)
(ii) Find the area of $△AOB$. (1)
(iii) (a) What is the total cost of silver plating the shaded part ABCD ? (2)
OR (iii) (b) What is the length of arc CD ? (2)

In a coffee shop, coffee is served in two types of cups. One is cylindrical in shape with diameter 7 cm and height 14 cm and the other is hemispherical with diameter 21 cm.
Based on the above, answer the following questions :
(i) Find the area of the base of the cylindrical cup. (1)
(ii) (a) What is the capacity of the hemispherical cup ? (2)
OR (ii) (b) Find the capacity of the cylindrical cup. (2)
(iii) What is the curved surface area of the cylindrical cup ? (1)