Question

The length and the breadth of the rectangular sheet are 1.80m and 90cm respectively .3 circular sheets of radius 14cm are cut out .Find the area of the remaining sheet.

Answer 1

Area of the rectangular sheet =
$l \times b \\ = 1.8m \times 90cm \\ = 16200m.$
Now, area of one circle =
$\pi \: r^{2} \\ = 22 \div 7 \times (14 \times 14) \: cm {}^{2} \\ =616 \: cm {}^{2}.$
Therefore, area of remaining sheet = area of the rect. sheet – 3(area of one triangle)
$=16200 \: cm {}^{2} - 3 \times 616 \: cm {}^{2} \\ = 14352 \: cm {}^{2} .$