Question

A poor artist on the street make funny cartoon for children and turns his living once he made a comic faced by drawing a circle with inner circle the radius of the bigger circle begging 30 cm and that of
smaller being 20cm as shown in the figure what is the area of cap given in this figure

Answer 1

subtract the area of small circle from big circle.......we get area of ring................then subtract the ar of ring from ar of big circle..................it is req area