Question

from each corner of a rectangular paper 30 cm into 20 CM a quadrant of a circle of radius 7 cm is cut find the area of the remaining paper

Answer 1

A rectangular paper has 4 sides and a quadrant is ¼ th of the total area.

So,

Total area cut off from the paper = area of 1 whole circle whose radius (R) =7 (given)

$= \pi {r}^{2} \\ \\ = \frac{22}{7} \times {7}^{2} = 22 \times 7 \\ \\ \bf \: = 154 \: \: c {m}^{2}$
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Total area of paper = (20×30) = 600 cm²

So, area of paper remaining

$= \bf 600 - 154 = 446 \: \: {cm}^{2}$
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