Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 3

EASY

8th CBSE

IMPORTANT

Earn 100

Find the total surface area and volume of the cylinder if area of the base $= 346.5 {cm}^{2}$ and height $= 24.5 c m$

Important Questions on Surface Area and Volume of Solids

EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 4

Find the height of the cylinder

(in cm)

whose volume is

462 {cm}^{3}

and diameter of the base is

7 cm

.

EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 5

A cylindrical milk tank is of diameter

3.5 m

and height

7 m

. How many litres of milk can be stored in the tank?

MEDIUM

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 6

A road roller takes

500

complete revolutions to level a ground. The diameter of the road roller is

1.26 m

and its length is

1 m

, if the area of the ground is

k m^{2}

, then find the value of

k

.

HARD

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 7

In a colony, there are $1000$ lamp posts cylindrical in shape. The diameter of each post is $35 cm$ and height is $3 m$ . Find the total cost of painting the curved surface area of all the lamp posts at the rate of $₹ 15$ per $square meter$ .

HARD

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 8

A rectangular piece of paper

22 cm

long and

12 cm

wide, is rolled along the length to form a cylinder of height

12 cm

. Find the volume of the cylinder so formed. Also, find the volume of cylinder formed when it is rolled along the breadth. Are the volumes the same?

EASY

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 9

3.08 cubic meters

of copper is drawn into a wire of radius

1.4 cm

. Find the length of wire (in

km

) so formed.

MEDIUM

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 10

The ratio of the curved surface area to the total surface area of right circular cylinder is

3 : 5

. Find the ratio of the height to the radius of the cylinder.

MEDIUM

8th CBSE

IMPORTANT

Joy Of Mathematics 8>Chapter 21 - Surface Area and Volume of Solids>Exercise>Q 11

The radii of two cylinders are in the ratio

2 : 3

and their heights are in the ratio

9 : 4

. Calculate the ratio of their volumes.