Question

Find the area of base and radius if a cylinder if its curved surface area is 660 square cm and height is 21 CM

Answer 1

Area of the cylinder =78.57

Answer 2

CSA = 660 square cm

height = 21 cm

CSA = 2 PIE rh

           2 * 22/7 * r * 21

660 = 132* r

132 * r = 660

r          =  660/132

r          =   5

Base area  = pie * r  * r

                     22/7 * 5 *5 = 78.57