Question

From a circular card sheet of radius 14 cm, tow circles of radius 3.5 cm and a rectangle of length 3 cm and breadth 1 cm are removed. Find the area of the remaining sheet. (Take $\pi =\frac{22}{7}$)

Answer 1

Required Area = Area of larger circle - 2(Area of smaller circle) - Area of rectangle

$=\pi R^2-\pi r^2-lb$

$=\frac{22}{7}(14{)}^2-2\left[\frac{22}{7}\right(3.5{)}^2]-3\times 1$

$=616-77-3=536$ $c{m}^2$