A person travels from P to Q at a speed of 40 kmph and returns by increasing his speed by 50%. What is his average speed for both the trips ? 

A rectangular garden is situated inside a square plot of side 30 metres. If the ratio of the length and breadth of the garden is 6:5, then the area of the largest garden is. 

The percentage of increase in the area of a rectangle, when both of its length and breadth are increased by 20% is

A man takes 4 hours in all to go to a market at a speed of 5km/hour and back to his house at 3km/hour. The distance between his house and market is: 

The difference between compound interest and simple interest on an amount of money in 3 years at the rate of 10% is Rs. 93. Then the amount in Rs. is: 

If A, B and C working together can do a job in 10 days. If A and C together can do it in 20 days and B and C together can do it in 15 days. If A and B work together, the number of days required to complete it is.