Area of a rectangle is equal to the area of the circle whose radius is 21 cm. If the length and the breadth of the rectangle are in the ratio of 14:11 respectively, what is its perimeter ?

Population of sale A in 2005 is what per cent of its total population for all the years together ?

What is the ratio between the total populations of states A and B respectively for all the years together ?

What is the percent rise in population of state A in 2007 from the previous year ?

What was the average population of state B (in million)for all the years together ?

For state B the percent rise in population from the previous year was the highest in which of the following years ?