Question

Find the height of a cylinder whose radius is 10 cm and the total surface area is 1445.71 cm².

Answer 1

Area=2pirh+2pi r²

$area = 2\pi rh + 2\pi \: {r}^{2}$

1445.71cm²=2*3.14*10*h+2*3.14*100

1445.71cm²=62.8h+628.4

1445.71/628.4=62.8h

2.3=62.8h