If 50% of (x −y) = 30% of (x + y), then what percent of x is y? 

If the perimeter of an equilateral triangle is 30 meters, what is its height?

If $$ {\sqrt{2x+9}+x=13}$$ then find the value of x?

A man earns a profit of 60% when he sells an article at 4/3 of the original selling price. Find the percent profit he makes at original price.

A circle and a rectangle have the same perimeter. The sides of the rectangle are 18 cm and 26 cm. The area of the circle is:

Mr. Mike borrowed Rs. 8500 at 4 % per annum compound interest. The compound interest compounded annually for 2 yeas is:

The ratio of two unequal sides of a rectangle is 1 : 2. If its perimeter is 24 cm, then the length of diagonal in cm is:

The third proportional of two numbers 4 and 20 is