A pump can fill a cistern in 40 minutes and another pump can empty the filled up cistern in 1 hour. By mistake, without closing the second pump, the first pump is opened. The time in which the empty cistern will be filled up is

A and B start a common business by placing their capital in the ratio of 5: 6. After 8 months A withdraws his capital. They received dividends in the ratio of 5: 9. For how long did B invest his capital?

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

Sum of two numbers is 15 and sum of their reciprocals is $$ {15\over56}$$. The two numbers are

Study the given graph carefully to answer the questions that follow:

If carpenter X and carpenter Y were to make a chair together how many days would they take?

If 6 men and 8 boys can do a piece of work in 10 days and 26 men and 48 boys can do the same in2days, then the time taken by 15 men and 20 boys to do the same type of work will be

Direction: The following diagram shows the percentage of population of Hindus, Sikhs and Muslims with respect to total population in a town during 2005 to 2008. Study the diagram and answer the questions:

If the total population in 2007 was 80 lakh, then the number of Hindus n 2007 was (in lakh) 

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?