A car travels the first one-third of a distance with a speed of 10km/hr,the next one-third distancewith a speed of 20km/hr and the last one-third distance with a  speed of 60km/hr.The average speed of the car for the whole journey is

A man rows 32km downstream and 14km upstream and he takes 6 hours to cover each distance.What is the speed of current?

In how much time the SI on  a principal amount be 0.125 times principal amount  at 10% p.a?

A person could save 10% of his income.But 2 years later,when his income increased by 20%,he could save the same amount only as before.By how much percentage has  his expenditure increased?

16 litres of mixture contains milk and water in the ratio 5:3.If 4 litres of milk is added to the mixture,ratio of milk to water in the new mixture will be

There is 60% increase in an amount in 6 years at SI.What will be the CI on Rs 12000 after 3 years at the same rate of interest?