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Mathematics
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In the figure given below, PQ is a chord of a circle with centre O and PT is a tangent. If ∠QPT = 60°, find ∠PRQ.

[3.02] Circles
Chapter: [3.02] Circles
Concept: Tangent to a Circle
Appears in 3 question papers

Due to sudden floods, some welfare associations jointly requested the government to get 100 tents fixed immediately and offered to contribute 50% of the cost. If the lower part of each tent is of the form of a cylinder of diameter 4.2 m and height 4 m with the conical upper part of same diameter but of height 2.8 m, and the canvas to be used costs Rs. 100 per sq. m, find the amount, the associations will have to pay. What values are shown by these associations? [Use π=22/7]

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 3 question papers

A hemispherical bowl of internal diameter 36 cm contains liquid. This liquid is filled into 72 cylindrical bottles of diameter 6 cm. Find the height of each bottle, if 10% liquid is wasted in this transfer.

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 3 question papers

A cubical block of side 10 cm is surmounted by a hemisphere. What is the largest diameter that the hemisphere can have? Find the cost of painting the total surface area of the solid so formed, at the rate of Rs. 5 per 100 sq. cm. [Use π = 3.14]

 

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 3 question papers

504 cones, each of diameter 3.5 cm and height 3 cm, are melted and recast into a metallic sphere. Find the diameter of the sphere and hence find its surface area.
[Use π=22/7]

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 3 question papers

The angle of elevation of an aeroplane from point A on the ground is 60˚. After flight of 15 seconds, the angle of elevation changes to 30˚. If the aeroplane is flying at a constant height of 1500√3 m, find the speed of the plane in km/hr.

[4.03] Heights and Distances
Chapter: [4.03] Heights and Distances
Concept: Heights and Distances
Appears in 3 question papers

At a point A, 20 metres above the level of water in a lake, the angle of elevation of a cloud is 30˚. The angle of depression of the reflection of the cloud in the lake, at A is 60˚.
Find the distance of the cloud from A.

[4.03] Heights and Distances
Chapter: [4.03] Heights and Distances
Concept: Heights and Distances
Appears in 3 question papers

A truck covers a distance of 150 km at a certain average speed and then covers another 200 km at an average speed which is 20 km per hour more than the first speed. If the truck covers the total distance in 5 hours, find the first speed of the truck.

[4.03] Heights and Distances
Chapter: [4.03] Heights and Distances
Concept: Heights and Distances
Appears in 1 question paper

Construct a triangle ABC in which AB = 5 cm, BC = 6 cm and ∠ABC = 60˚. Now construct another triangle whose sides are 5/7 times the corresponding sides of ΔABC.

[3.03] Constructions
Chapter: [3.03] Constructions
Concept: Division of a Line Segment
Appears in 1 question paper

If the coordinates of points A and B are (-2, -2) and (2, -4) respectively, find the coordinates of P such that AP =(3/7)AB, where P lies on the line segment AB.

 

[3.03] Constructions
Chapter: [3.03] Constructions
Concept: Division of a Line Segment
Appears in 2 question papers

A bus travels at a certain average speed for a distance of 75 km and then travels a distance of 90 km at an average speed of 10 km/h more than the first speed. If it takes 3 hours to complete the total journey, find its first speed?

[4.03] Heights and Distances
Chapter: [4.03] Heights and Distances
Concept: Heights and Distances
Appears in 1 question paper

Prove that the tangent at any point of a circle is perpendicular to the radius through the point of contact.

[3.02] Circles
Chapter: [3.02] Circles
Concept: Tangent to a Circle
Appears in 14 question papers

Construct a Δ ABC in which AB = 6 cm, ∠A = 30° and ∠B = 60°, Construct another ΔAB’C’ similar to ΔABC with base AB’ = 8 cm.

[3.03] Constructions
Chapter: [3.03] Constructions
Concept: Division of a Line Segment
Appears in 1 question paper

The angle of depression of a car parked on the road from the top of a 150 m high tower is 30°. The distance of the car from the tower (in metres) is

`(A) 50sqrt3`

`(B) 150sqrt 3`

`(C) 150sqrt2`

`(D) 75`

[4.03] Heights and Distances
Chapter: [4.03] Heights and Distances
Concept: Heights and Distances
Appears in 1 question paper

If the total surface area of a solid hemisphere is 462 cm2 , find its volume.[Take π=22/7]

 

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 1 question paper

The angle of elevation of an aeroplane from a point on the ground is 60°. After a flight of 30 seconds the angle of elevation becomes 300 If the aeroplane is flying at a constant height of 3000 3 m, find the speed of the aeroplane.

[4.03] Heights and Distances
Chapter: [4.03] Heights and Distances
Concept: Heights and Distances
Appears in 1 question paper

The largest possible sphere is carved out of a wooden solid cube of side 7 em. Find the volume of the wood left

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 1 question paper

Water in a canal, 6 m wide and 1.5 m deep, is flowing at a speed of 4 km/h. How much area will it irrigate in 10 minutes, if 8 cm of standing water is needed for irrigation?

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 1 question paper

In Figure 2, ABCD is a trapezium of area 24.5 sq. cm. In it, AD|| BC, ∠ DAB = 900, AD = 10 cm and BC = 4 cm. If ABE is a quadrant of a circle, find the area of the shaded region. [Take π=22/7]

 

[7.02] Surface Areas and Volumes
Chapter: [7.02] Surface Areas and Volumes
Concept: Surface Area of a Combination of Solids
Appears in 1 question paper

Find the ratio in which the line segment joining the points A(3,- 3) and B(- 2, 7) is divided by x-axis. Also find the coordinates of the point of division.

[3.03] Constructions
Chapter: [3.03] Constructions
Concept: Division of a Line Segment
Appears in 1 question paper
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All Solutions for CBSE Class 10 CBSE Mathematics. You can further filter Question Answers by subjects and chapters. Solutions for most of the questions for CBSE can be found here on shaalaa.com. You can use these solutions to prepare for your studies and ace in exams. Solving questions is a great way to practice and with shaalaa.com, you can answer a question and then also check your answer with the solutions provided.
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