The perimeter of a semicircle on diameter AB is (3.5π+7)cm. The area enclosed by the semicircle is
Given below is a semicircle of diameter 12cm which encloses two other semicircles. Find the area of shaded region.
In the given figure, APB and CQD are semicircles of diameter 7 cm each, while ARC an BSD are semicircles of diameter 14 cm each. Find the (i) perimeter, (ii) area of the shaded region.