Question

A paper is in the form of a rectangle PQRS in which PQ= 10cm and QR= 7cm. Two semi-circular portions with QR and PS as diameters are cut off. Find the area of the remaining part

Answer 1

Area of remaining part = area of rectangle - area of two semi circle

so, b=10. l=7

area of rectangle 10×7

70cm

area of two semi circle 2×1/2 ×22/7×7/2×7/2

77/2-70

63 cm²