HARD
8th CBSE
IMPORTANT
Earn 100

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.

Important Questions on Surface Area and Volume

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 cm. The pipe is 2 mm thick all around. Find the volume of a 2 m long pipe if 1 cm3 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 cm can be cut from a cubical box of thermocol of side 12 dm?
HARD
8th CBSE
IMPORTANT
'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>HOTS>Q 1
The dimensions of a cuboid are in the ratio 4 : 2 : 3 and its total surface area is 832 m2. Find its dimensions.
MEDIUM
8th CBSE
IMPORTANT
'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>HOTS>Q 2
The area of 4 walls in a room is 240 m2. If its length is twice the breadth and height is 4 m, find the area of the floor.
MEDIUM
8th CBSE
IMPORTANT
'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>HOTS>Q 3
Find the length of the diagonal and lateral surface area of a cube of edge 6 cm.
EASY
8th CBSE
IMPORTANT
'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>HOTS>Q 4
Find the length of the longest rod that can be put in a room of dimensions 6 m×4 m×3 m.
MEDIUM
8th CBSE
IMPORTANT
'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Worksheet>Q 1

If the side of a cube is halved, then its volume is also halved.

EASY
8th CBSE
IMPORTANT
'I Did It' Mathematics>Chapter 12 - Surface Area and Volume>Worksheet>Q 1

If the side of a cube is doubled, then its surface area becomes 4 times the original surface area.