A milkman sells such milk which contains 5% water. What amount of pure milk should be added to 5 litres milk so that the percentage of water be reduced to 2% ?

The ratio of present ages of Atul and Mithun is 3 : 4. Six years hence the ratio of their ages will become 4 : 5. What is the present age of Mithun in years ?

15 labourers complete a work in 10 days working 6 hours per day. If 18 labourers are employed on that work and the work is to be completed in 5 days then how many hours per day the work should be continued ?

The present age of father is five times the age of the son. Five years ago the age of father was ten times the age of his son at that time. How old is father at present ?

The production of a company decreases by 10% every year. If the production in the year 1999 was 18 lakhs tonnes, then how many lakh tonnes production will be in 2001 ?

Two pipes can fill a tank in 12 hours and 15 hours respectively. A third pipe can empty it is 20 hours. If the tank is empty and all the 3 pipes are opened then the tank will be full in ?

According to a survey conducted by Census Board the population of country ‘X’ is increased by 20% per annum.If the population was 25 lakhs in 1999, then population in 2001 will be increased by