A cone-shaped tent (height 4 m, base radius 3 m) is exposed to wind. If only the lateral surface faces the wind, what area is affected?
Show answer & explanation
Correct answer: B
Explanation
Has been given :
height = 4 m
radius = 3 m
According to the formula:
l = √(r² + h²)
Lateral surface area = πrl
l = √(3² + 4²)
= √(9 + 16)
= √25
= 5
Lateral surface area = π × 3 × 5 = 15π