MEDIUM
9th CBSE
IMPORTANT
Earn 100

If the radius of a sphere is doubled then what is the ratio of the volume of original sphere to the new sphere?

Important Questions on Surface Areas and Volumes

HARD
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 26
The dimensions of a rectangular metallic sheet are 48 cm×36 cm. From each corner, a square of side 8 cm is cut off and open box is made from the remaining sheet. Find the volume of the box.
MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 27
Two right circular cones of equal curved surface areas have slant heights in the ratio of 3:5. Find the ratio of their radii.
MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 28
In the cylindrical container, the base radius is 8 cm. If the height of the water level is 20 cm, find the volume of the water in the container. (Take: π=3.142)
MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 29
The dimensions of a hall are 20 m×16 m. The sum of the areas of its floor and flat roof is equal to the surface area of its four walls. Find the volume and height of the hall.
MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 30
A well with 10 m inside diameter is dug 14 m deep. Earth taken out of it is spread all around it to make an embankment of height 423 m. Find the width of the embankment.