A can do a piece of work in 15 days and B can do it in 10 days. Working together how long will they take to finish the work?

If the length of a rectangle is 8 cm and its diagonal is 10 cm, find its area.

A man loses Tk. 55.50 yearly when the annual rate of interest falls from 11.5% to 10% his capital is:

The population of a certain town increases by 50 percent every 50 years. If the population in 1950 was 810 , i...

The average of three Numbers is U. If two numbers are x and y, which is the third number?

the angles of a triangle are in the ratio 5: 4: 3 How many degrees are there in the largest angle?

If m and p are positive integers and ( m +p) m is even , which of the following must be true?