Realated Questions
A certain amount of money has been invested to earn a simple interest of 10% per annum. The interest earned every year is again invested at the same rate. After how many years will the amount become the square of itself ?
A semicircular piece of paper (with radius 7 cm) is folded along the diameter to form a cone such that he centre of the semicircle becomes the vertex of the cone.If the base of the cone is covered by a circular paper lid, what is the total surface area of the cone ?

There is a square park with sides 20 m, and there are 2 diagonal paths that are√2 m wide.Find the area of the park without the paths.