JAMB - Mathematics (1979 - No. 32)
A cylinder of height h and radius r is open at one end. Its surface area is
2\(\pi\)rh
\(\pi\)r2h
2\(\pi\)rh + \(\pi\)r2
2\(\pi\)rh + 2\(\pi\)r2
Εξήγηση
A cylinder of height h ans radius r is open at one end, its surface area is 2\(\pi\)rh + \(\pi\)r2