If the total surface area of a solid sphere is 262 cm², find its radius.
Show answer & explanation
Correct answer: A
Explanation
Total surface area = 262 cm²
according to formula
Surface area of sphere = 4πr²
262 = 4 × 22/7 × r²
262 = 88/7 × r²
r² = (262 × 7) / 88
r² = 20.84
r = 4.56 cm