A paper is in a square form whose one side is 20 cm Two semi circles are drawn on its opposite sides...........

Quantitative Aptitude (CDS) Mensuration 2D

A paper is in a square form whose one side is 20 cm. Two semi-circles are drawn on its opposite sides as diameters. If these semi-circles are cut down what is the area of the remaining paper?

400-50π m^2

200-100π m^2

400-100π m^2

200-100π m^2

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Explanation:

area of square is=20×20=400
semi circle radius is =10 cm
area of semi-circle =π ×10× 10/2
area of two semi circle=π ×10 ×10
= 100π area of remaining paper is=400-100π square metre