If the diameter of a sphere is 63 cm, then what is the total surface area of the sphere?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e 12474 cm2
Formula used:
Total surface area of sphere = 4πr2 ---- (1)
Calculations:
Radius = 63/2 = 31.5 cm
Using equation (1), we get
⇒ Total surface area of sphere = 4 × (22/7) × 31.5 × 31.5
⇒ 12474 cm2