Question

A round steel drum is 12 in in diameter and 31 in in height . If it’s enclosed what is the surface area

Answer 1

Answer: A = 444π

Step-by-step explanation:

1. radius = d / 2 = 12 / 2 = 6

2. A = 2 x A (circles) + H x l (circle) = 2 x πr² + h x 2πr = 2 x π x 36 + 31 x 2 x π x  6 = 72π + 372π = 444π