Question

A solid cylinder of radius r and height h is vertically cut into two equal parts, then the total surface are is increased by

Answer 1

a)rh b)r^2h c)2rh d)4rh

Answer 2

Oh i see wat u did There I'll try plzz w8

Answer 3

So the total surface are is increased by 2r·h + 2r·h, which can be simplified into...

Answer 4

4rh

Answer 5

There you go.