Question

From a rectangular sheet of paper ABCD with AB=40cm and AD=28cm, semi-circular portion with BC as diameter is cut off, Find the area of the remaining paper

Answer 1

area of the paper=40×28
=1120
area of semi-circle=615 .75
area of remaining paper=1120-307.8
=812.2

Answer 2

Area of complete sheet is 1120
And area of semicircular sheet is 308
Hence remaining area is 1120-308 = 812