Question

a circular piece of radius 2cm is cut from a rectangle sheet of length 5cm and breadth 3cm. find the area left in the sheet​

Answer 1

Area of a rectangle = length × breadth

$= 5 \times 3$

$= 15 {cm}^{2}$

Area of the circle = π r^2

$= \pi \times 2 \times 2$

$= 3.142 \times 4$

$= 12.57 {cm}^{2}$

Area of the remaining area = A(□) - A(○)

$= 15 - 12.57$

$= 2.43 {cm}^{2}$