The ratio between the number of sides of two regular polygons is 1 : 2 and the ratio between there interior angles is 2 : 3. The number of sides of these polygons is respectively 

The price of $$ {4{1\over2}}$$ meter of cloth is Rs.$$ {60{3\over4}}$$. Find the cost per meter.

  The value of $${{1}\over 1+\sqrt { 2} + \sqrt { 3}}+{{1}\over 1-\sqrt { 2} + \sqrt { 3}} $$ is

Ram sells two articles, each for the same price Rs.720. He incurs 20% loss on the first and 10% loss on the second. Find his overall percent loss.

Average present ages of A, B and C is 25 years. The ratio of the present ages of B and C is 4:5. After 6 years, the ratio will be B and C is 5:6, then what is the present age of A?

 If $${\sqrt{7-2}\over\sqrt{7+2}}=a\sqrt{7}+b$$, then the value of a is : 

If each side of a cube is increased by 10%. Then find the percent change in the volume of the cube.

A prism and a pyramid have the same base and the same height. Find the ratio of the volumes of the prism and the pyramid.