Question

find area of shaded portion

Answer 1

Area of 1st shaded portion:-

Diameter=4cm

Radius=2cm

Area of semicircle=1/2πr²
=1/2*22/7*2*2
=44/7
=6.28cm²


Area of 2nd shaded portion:-

Diameter=3cm

Radius=1.5cm

Area of semicircle=1/2πr²
=1/2*22/7*1.5*1.5
=24.75/7
=3.53cm²


Area of 3rd shaded portion:-

Diameter=5cm

Radius=2.5cm

Area of semicirclr=1/2πr²
=1/2*22/7*2.5*2.5
=68.75/7
=9.82cm².

HOPE THIS HELPS...........