Question

if two coins of radius 3cm and 6cm are kept one over the other find the area of big coin not included in the smaller one

Answer 1

surface area of sphere=4πr^2
=4×π×6×6
=4×π×36
multiply this mate you Will get your answer

Answer 2

6x6x3.14-3x3x3.14

=113.04-28.26

=84.78cm squared