Question

a sheet of paper is in the form of a rectangle ABCD in which AB =40 and AD =28 cm. A semi circular portion with BC as diameter is cut off . find the area of the remaining paper​

Answer 1

Answer:

1043cm²

Step-by-step explanation:

AB=40cm

AD=28cm

As we know, a semi circular portion with BC as diameter is cut off

BC=28cm

If we do half of BC and draw a semi circle

we get

radius= 28/2×2 =7cm

Area of rectangle=Length ×breadth

= 40cm×28cm

=1120cm²

Area of semi circle= 1×πr²/2

=22×7×7/2×7

=77cm²

area of the remaining paper=Area of rectangle-Area

of semi circle

=1120cm²-77cm²

=1043cm²