If the circumference of a circle increases from 4pi to 8 pi, what change occurs in the area ?

Area is quadrupled

Area is tripled

Area is doubles

Area become half

Correct Answer : A

How many pieces of 0.85 meteres can be cut from a rod 42.5 meteres long

Find the compound interest on Rs. 7500 at 4% per annum for 2 years, compounded annually.

What is the minimum number of square marbles required to tile a floor of length 5 metres 78 cm and width 3 metres 74 cm?