Question

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

Answer 1

Area of sheet $=\pi r^2=\frac{22}{7}\times 14\times 14$

$=616c{m}^2$

Area of $2$ small circles $=2\times \pi \times 3.5\times 3.5$

$=77c{m}^2$

Area of rectangle $=3\times 1$

$=3c{m}^2$

Remaining Area $=616-(77+3)$

$=536c{m}^2$.