Question

The side of a square is 5 cm which is 13 cm less than the diameter of a circle. what is the approximate area of the circle?

Answer 1

as side of square is 5 cm which is 13cm less then the diameter of a circle
so side = 5cm 
diameter = 13+5=18cm
radius = 18/2=9cm
so area of circle=$\pi r^{2}$
                          =22*9/7
                           =28.28