Question

Find the surface area of a sphere whose diameter is d.

Answer 1

surface area of a sphere = 4*pi* r^2

= 4* pi * (d/2)^2

=4*pi*(d^2/4)
= pi*d^2

Answer 2

area of sphere = 4πrsqu.
= 4×22/7×(d/2 )squ.
= 88/7×d^squ./4
= 22/7×d^squ