Question

find the area of a quadrant of a circle whose circumference of a circle exceeds its diameter by 15cm.

Answer 1

Using the formula 
A=πr2
d=2r
Then solving for A
A=1/4πd2
     = 1/4*22/7*15*15
     = 176.71
hope it helps u

Answer 2

I attached photo of the solution