Question

The volume of a right circular cylinder can be obtained from its curved surface area by multiplying it by its

(a) \(\frac{radius}{2}\)

(b) \(\frac{2}{radius}\)

(c) height 

(d) 2 × height

Answer 1

(a) \(\frac{radius}{2}\)

V = πr²h and Curved surface area = 2πrh

∴ V = \(\frac{2πrh}{2}\times{r }= CSA\times\frac{r}{2}\)