Question : The breadth of a rectangle is $\frac{4}{5}$th of the radius of a circle. The radius of the circle is $\frac{1}{5}$ of the side of a square, whose area is 625 cm². What is the area of the rectangle if the length of the rectangle is 20 cm?

Question : If the diameter of a circle is 14 cm, find the area of the sector of the circle whose central angle measures $60^{\circ}$.

Question : What is the area of the lateral surface of a right circular cylinder, If the circumference of the base is 22 cm and its height is four times its radius?

Question : The area of a circle is 1386 cm². What is the radius of the circle? [Use $\pi=\frac{22}{7}$ ]

Question : When a wire is bent in the form of a square, then the area enclosed by it is 5929 cm². If the wire is bent into the form of a circle, then what will be the area enclosed by the wire?