A sheet of paper is in the from of rectangular ABCD in which AB=40cm and AD=28cm. A semi-circular portion with BC as diameter is cut off. Find the area of the remaining paper.
Open in App
Solution
⇒Diameter=BC=28cm [ Opposite sides of rectangle are equal ]
⇒Radius(r)=282=14cm
⇒ Area of a semi-circle =πr22
∴ Area of a semi-circle =12×227×(14)2=308cm2
⇒ Now, area of a sheet =40×28=1120cm2
∴ Area of remaining paper =Area of sheet - Area of a semi circle.