JIPMAT 2023 (QA) PYQs

If the radius of each of four outer circles is $r$, then the radius of the innermost circle is

The area of a circular playground is $22176 \ cm^2$. What is the cost of fencing this ground at the rate of ₹50 per metre?

The radius of two concentric circles are 13 cm and 8 cm. AB is a diameter of the bigger circle. BD is tangent to the smaller circle touching it at D. The length AD is.