'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 15

MEDIUM

8th CBSE

IMPORTANT

Earn 100

The external length, breadth and height of a closed rectangular wooden box are $20 c m, 12 c m and 6 c m$ , respectively, and thickness of wood is $0.5 c m$ . Find the volume of the wood.

Important Questions on Surface Area and Volume

MEDIUM

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 16

Find the height of a cylinder whose volume is

3.08 m^{3}

and diameter of the base is

140 c m

.

HARD

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 17

A water tank is in the form of a cylinder whose radius is

70 c m

and height is

1 m

. Find the quantity of water in litres that can be stored in the tank.

MEDIUM

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 18

The radius and height of a cylinder are in the ratio

1 : 3

. Find the radius if its volume is

3234 c m^{3}

.

MEDIUM

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 19

The radii of two cylinders are in the ratio

2 : 3

and their heights are in the ratio

5 : 3

. Find the ratio of their volumes.

MEDIUM

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 20

The circumference of the base of a cylindrical vessel is

132 c m

and its height is

25 c m

. How many litres of water can it hold?

[1000 c m^{3} = 1 litre]

HARD

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 21

A well of diameter

3 m

is dug

21 m

deep. The earth taken out of it is spread evenly all around it to a width of

4 m

to form an embankment. Find the height of the embankment.

HARD

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 22

A metal pipe has a bore (internal diameter) of

5 c m

. The pipe is

2 m m

thick all around. Find the volume of a

2 m

long pipe if

1 c m^{3}

of the metal has a mass of

7.7 g

.

MEDIUM

8th CBSE

IMPORTANT

'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Exercise 12.2>Q 23

How many cubical blocks of side

6 c m

can be cut from a cubical box of thermocol of side

12 d m

?