Question

The difference between the area of a circle and the square of its radius is 105 sq m. Find the circumference of circle

Answer 1

Let the radius of the circle be x m
So, Area of the circle = pi*r^2 = 22/7*x*x = 22/7x^2
Side of the square = Radius of the circle = x
So, Area of the square = x*x = x^2
A/q
22/7x^2 - x^2 = 105
=> 15/7x^2 = 105
=> x^2 = 105*7/15
=> x = (49)^1/2
=> x = 7 m

Hence,
Circumference of the circle = 2*pi*r = 2*22/7*7 = 44m Ans

<Hope it helps>

Answer 2

it is ans am i corect