Q4 of 68 Page 15

A rectangular piece is 20m long and 15m wide. From its four corners, quadrants of radii 3.5m have been cut. Find the area of the remaining part.


Length of rectangle = 20m2


Breadth of rectangle = 15m2


Area of rectangle = 20×15 = 300m2


Radius of quadrant = 3.5m2


Area of quadrant =


Area of quadrant =


Area of 4 quadrant = = 2×19.25 = 38.50m2


Area of remaining part = (area of rectangle-area of 4 quadrant)


Area of remaining part = 300 – 38.50 = 261.5m2


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