MEDIUM
9th CBSE
IMPORTANT
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The radius of a hemisphere is r. What is its volume?

Important Questions on Surface Areas and Volumes

MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 22
What is the total surface area of a hemisphere of radius r?
MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 23
If the radius of a sphere is 2r, then what is its volume?
MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 24
If the radius of a sphere is doubled, then what is the ratio of the surface area of original sphere to the new sphere?
MEDIUM
9th CBSE
IMPORTANT
Full Marks Mathematics 9>Chapter 13 - Surface Areas and Volumes>TEST YOUR SKILLS>Q 25
If the radius of a sphere is doubled then what is the ratio of the volume of original sphere to the new sphere?
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.