Find the area of a circle having circumference 440cm.
Find the circumference of a circle whose area is 616 cm^{2}.
If the diameter of the circle is 150 cm less than the circumference, what is the length of its circumference?
A flexible wire is in the form of a circle of radius 42 cm.If the wire is bent into a square, what will be the length of a side of the square?
A semicircle has area 77 cm^{2}^{}.Find the perimeter.
A semicircle has area 1232 cm^{2}.Find the perimeter.
An ant moves 2.2 cm per second.How long will it take to go round a circle of radius 7 cm?
A wire is looped in the form of a circle of radius 28 cm.It is rebent into a square form.
A motor car is driven at the rate of 66km/hour.Each of its wheels makes 500 revolutions per minutes.What is the radius of the wheel?
A field is in the form of a circle.The cost of ploughing the field at Rs.1.50 per m^{2} is Rs.5775.Find the cost of fencing the field at Rs. 8.75 per metre.