Very important question of mensuration including
very important concept of it.need solution!
Rd sharma class 10 maths exercise-15.4 mensuration.
we have to find the area of the shaded region from
a rectangular region ABCD with AB = 20 cm, a right
angle AED with AE = 9 cm and DE = 12 cm, is cut off.
On the other end, taking BC as diameter, a semicircle
is added on outside the region.(π = 22/7)