Question

Find the the surface area of the cylinder in terms of pi.

Answer 1

Answer:

2πr(r+h)=Total surface area formula of cylinder

2×π×9(9+20)in^2

18π×29in^2

522π in^2(answer)

Answer 2

Answer:

option (b) is correct.

Step-by-step explanation:

Given;

Radius (r) =9 in.

Height (h )= 20 in.

As we know that,

Surface area of cylinder = $2\pi r(r+ h)$

                                        = 2×$\pi$ ×9( 9+ 20)

                                        =18$\pi$ ×29

                                       = 522$\pi$ sq.in.