MEDIUM
8th CBSE
IMPORTANT
Earn 100

A cube of side 5 cm is cut into as many 1 cm cubes as possible. What is the ratio of the surface area of the original cube to that of the sum of the surface areas of the smaller cubes?

Important Questions on Mensuration

HARD
8th CBSE
IMPORTANT
A square sheet of paper is converted into a cylinder by rolling it along its side. If the ratio of the base radius to the side of the square is 1:kπ, then find k.
EASY
8th CBSE
IMPORTANT
How many cubic metres of the earth must be dug to construct a well 7 m deep and of diameter 2.8 m? Write the answer in decimal in m3. [Take π=227]
MEDIUM
8th CBSE
IMPORTANT
The radius and height of a cylinder are in the ratio 3:2 and its volume is 19.404 cm3. Find its radius and height.
HARD
8th CBSE
IMPORTANT
The thickness of a hollow metallic cylinder is 2 cm. It is 70 cm long with outer radius of 14 cm. Find the volume of the metal used in making the cylinder, assuming that it is open at both the ends. Also, find its weight if the metal weighs 8g per cm3.
EASY
8th CBSE
IMPORTANT

Radius of a cylinder is r and the height is h. Find the change in the volume if the height is doubled.

EASY
8th CBSE
IMPORTANT

Radius of a cylinder is r and the height is h. Find the change in the volume if the height is doubled, and the radius is halved.

MEDIUM
8th CBSE
IMPORTANT

Radius of a cylinder is r and the height is h. Find the change in the volume if the height remains the same, and the radius is halved.

MEDIUM
8th CBSE
IMPORTANT
If the length of each edge of a cube is tripled, how many times its volume will increase?