A triangle is divided into 4 pieces and the area of the 4 regions are given inside the corresponding regions. The value of x is
22
18
15.5
12.5
Join AP. Let area of ∆ADP = b a + b = x
The figure below shows a circle divided into 3 equal parts. The shaded region corresponds to 23rd of the circle. If the unshaded region corresponds to a3rd of the circle. Then, the value of a is ___.