Question

A circle of radius 7cm is inside a cirvle of radii 14cm . If the area of small circle has been removed from the big circle then the area of remaining part of the circle is ?

Answer 1

area of outer circle=22/7×14^2
=616cm^2
area of inner circle=22/7×7^2
=154cm^2
area of remaining part =616cm^2-154cm^2
=462cm^2