Known :
r = 5 in
h = 4 in
Asked :
SA = ...?
Answer :
SA = 2πr² + 2πrh
= 2πr (r + h)
= 2 × 3,14 × 5 (5 + 4)
= 31,4 × 9
= 282,6 in²
Hope it helps and is useful :)
