Mensurationeasy · Past Paper
The radius of a sphere is 21 cm. Find its surface area.
A5544 cm²
B1386 cm²
C2772 cm²
D441 cm²
✓ Correct Answer: A — 5544 cm²
Area = 4πr² = 4 * (22/7) * 21 * 21 = 88 * 63 = 5544 cm².
Share this question
More from Mensuration
- A cylindrical pipe has inner diameter 4 cm and water flows through it at 20 m/min. How long would it take to fill a conical vessel of radius 40 cm and depth 72 cm?
- A right prism has a height of 15 cm and its base is an equilateral triangle of side 6 cm. Find its lateral surface area.
- The base of a prism is an equilateral triangle of side 4 cm. If its height is 10 cm, find its total surface area.
- A water tank is in the shape of a cube of side 2 m. What is its capacity in liters?
- The TSA of a cube is 24 sq. units. What is the side of the cube?