Question

Find the height of a solid cylinder whose total surface area is 660cm²
and radius 5cm.

Answer 1

TSA OF CYLINDER = 2 pi r(h+r)
660cm^2 = 2 × 22/7 × 5 (h+5)
660×7 ÷ 44×5 = h+5
21 = h+5
h=21-5 = 16cm
So height is cylinder is equal to 16 cm