Same chapter1 markDifficulty: Medium
If the radius of a sphere is doubled, its volume becomes:
Cylinder, Cone and Sphere
3 marksDifficulty: Medium
Find the curved surface area and the total surface area of a hemisphere of radius 7 cm. Take π = 22/7.
Original Khojo Papers practice question — not from a past board paper.
Answer
Curved surface area 308 cm2 and total surface area 462 cm2.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Curved surface area = 2πr2 = 308 cm2. Adding the flat circular face of area πr2 = 154 cm2 gives 462 cm2.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
Find the volume of a sphere of radius 21 cm. Take π = 22/7.
Cylinder, Cone and Sphere
Same chapter3 marksDifficulty: Medium
A cone has radius 7 cm and height 24 cm. Find its slant height, its curved surface area and its volume. Take π = 22/7.
Cylinder, Cone and Sphere
Same chapter3 marksDifficulty: Medium
A cone, a hemisphere and a cylinder stand on equal bases and have the same height. Write the ratio of their volumes.
Cylinder, Cone and Sphere
Same chapter3 marksDifficulty: Medium
Find the total surface area of a cone of radius 7 cm and slant height 25 cm. Take π = 22/7.
Cylinder, Cone and Sphere
Same chapter1 markDifficulty: Medium
The curved surface area of a cone of radius r and slant height l is:
Cylinder, Cone and Sphere