Question

Find the value of a sphere whose surface area is 616 centimetre cube

Answer 1

Surface area of Sphere = 4πr²

4πr²=616

πr²=616/4

πr²=154

r²=154×7/22

r²=7×7

r=7

Volume of sphere = 4/3πr³

=4/3×22/7×7×7×7

=4312/3

=1437.33 cm³

Answer 2

CSA of sphere is 4πrsquare

616=4×22/7×r square

616×7/4×22=r square

7×7=r square

√49=r

r=7