Question

The surface area of sphere is 616sq.cm then its diameter is?

Answer 1

Given Surface area = 616sqm.

            4pir^2 = 616

            pir^2 = 154

            r^2 = 154 * 7/22

                   = 49..
       
              r = 7cm.

             diameter = 2 * 7

                             = 14cm.

Answer 2

surface area of sphere=4Πr²
4Πr²=616
Πr²=154
22/7*r²=154
r²=7*7
r=7
diameter =14