Question

Find the shaded region

Answer 1

Here,

To find shaded area of shaded region

Area of shaded region = area of full circle - area of semi circle - area of small semi circle BOE +2(area of semi circle with diameter AB)

Here's the calculation

Diameter of 3 semi cirles are equal

Therefore diameter of one = 42/3

= 14cm

Therefore radius = 7cm

radius of big circle =42/2 = 21cm

Now please do calculations

as it is not possible here

Answer 2

Answer:AREA OF CIRCLE - AREA OF SEMICIRCLES + AREA OF SMALL SEMICIRCLE....

THEN YOU WILL GET YOUR ANSWER......