A tank can be filled up by two pipes A and B in 2 hours and 3 hours respectively. A third pipe C can empty the full tank in 6 hours. If all the taps can be turned on at the same time, the tank will be full in

Sameer is as much younger to Mohan as he is older to Arun. If the sum of the ages of Mohan and Arun is 48, the age of Sameer is

Of the three numbers, the first is one-third of the second and twice the third. The average of these numbers is 27. The largest of these numbers is

A train 100 metres long running at 54km/h takes 20 seconds to pass a bridge. The length of the bridge is

The length of a square is increased by 15% and breadth decreased by 15%. The area of the rectangle so formed

A mixture of 40 litres of milk and water contains 10% of water. How much water is to be added to the mixture so that the water may be 20% in the new mixture.

The ratio of milk and water in 60 litres of adulterated milk is 2 : 1. If the ratio of milk and water is to be 1 : 2, then the amount of water to be added further is

Sanjay sold his watch for Rs. 1140 and thereby loses 5%. In order to gain 5% he has to sell the watch for

A piece of cloth costs Rs. 70. If the piece is 4 metre longer and each metre costs Rs. 2 less, the cost remains unchanged. The length of the piece is