If 20/Y = Y/45,what is the value of y?

The difference in selling price of a radio at gains of 10% and 15% is Rs. 80. Find the price of the radio.

What percentage is 1/8 ?

One fifth of a number exceeds its one seventh by 154. Find the number

A boy was required to divide a given number by 3/5 while he wrongly multiplied the same number with 3/5 . If he gets the answer as 4 1/2 what is the correct answer?

The area of a hall is 1250 sq.m. The length of the hall is double its breadth. The length of the hall is