The radius of a sphere is 3.5 cm. What is the total surface area of the sphere?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 154 cm2.
The total surface area of the sphere = 4πr2
⇒ 4 × 22/7 × 3.5 × 3.5
⇒ 4 × 22 × 0.5 × 3.5
⇒ 154 cm2