Mensurationeasy · Past Paper
The surface area of a sphere is 'S'. If its radius is tripled, the new surface area is:
A3S
B6S
C9S
D27S
✓ Correct Answer: C — 9S
S ∝ r². Tripling r results in (3)² = 9 times the area.
Share this question
More from Mensuration
- What is the area of a square with a side length of 8 cm?
- A cylinder has a base radius of 5 cm and height of 14 cm. Find its volume.
- Find the area of the four walls of a room with length 6m, breadth 4m, and height 3m.
- Find the area of a square whose diagonal is 8 cm.
- Area of a triangle with sides 5, 12, 13 is: