If the diameter of a sphere is 56 cm, then what is its surface area? (Take π = 22/7)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 9856 cm2.
Given:
Diameter of a sphere is 56 cm
Formula used:
Surface area of sphere = 4πr2 ---- (1)
Calculations:
Using equation (1), we get
⇒ Surface area of sphere = 4πr2
⇒ 4 × (22/7) × 28 × 28
⇒ 4 × 22 × 4 × 28 = 9586 cm2