Question

From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet. (Take $\pi$ = 3.14)

Answer 1

Outer radius of circular sheet = $4$ $cm$
Inner radius of circular sheet = $3$ $cm$
Remaining area = $3.14 \times 4 \times 4 - 3.14 \times 3 \times 3$
= $50.24 - 28.26$
= $21.98$ $cm^2$