Three pipes, A B and C, can fill a cistern in 12, 18 and 24 minutes, respectively. If all the pipes are opened together for 7 minutes, what will be the volume of the water that overflows as the percentage of the total volume of the cistern?

If 12x – 15 y =9x + 5y, the value of $$ {x^{2}+{y^{2}}\over{x^{2}-y^{2}}}$$ is

Direction (66-70): What should come in place of the question mark(?) in the following number series?

729, 243, 81, 27, ?

Direction: Study the following graph and answer the questions based on it.

In which year was the percentage increase in production as compared to the previous year, the maximum? 

In a regular polygon, the exterior and interior angles are in the ration 1:4.The number of sides of the polygon is

The average of four consecutive even numbers is 15. The 2nd highest number is: 

∠A, ∠B, ∠C are three angles of a triangle. If ∠A -∠B =18°, ∠B – ∠C = 45°, then, ∠B, ∠A and ∠C are

A certain amount of money earns Rs. 540 as simple interest in 3 years. If it earns a compound interest of Rs. 376.20 at the same rate of interest in 2 years, find the amount.