Question

In the given figure PQRS is a square and OA=0B=0C=OD =7cm. If the
shaded region include two semi circles and two quarter circles, then find the
area of unshaded region.
S
B.​

Answer 1

Answer:

Length of boundary of shaded region=66cm.

Step-by-step explanation:

OA=OB=OC=OD=7cm

Circumference of semicircle=πr

Here, we have four semicircles with radius   = 2 /7  cm.

4×  7 /22 ×  2/7

=44cm

22/7 ×7

=22cm

∴ Length of boundary of shaded region=44+22

=66cm.