Speed of train B is 20% more than speed of train A and length of train A and B is 720 meters and 600 meters respectively. If both trains running in opposite direction cross each other in 24 second, then find speed of trains B (in km/hr)?

A tap can fill a Tank in 16 hours. Due to a hole in its base it is filled in 24 hours, If tank is full then in how many hours it will be empty through the hole. 

5 number whose average is 76, the first is 3/7 times the sum of other 4. the first number is: 

Sudhir and Shyam can do a work in 12 days, while Shyam alone can complete it in 30 days. In how many days can Sudhir complete that work alone?

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 9 % per anmum is Rs . 405 The sum is

Find out the H.C.F of 306, 204 and 136.

A certain number when divided by 175 leaves a remainder 132. When the same number is divided by 25, the remainder is:

A and B can separately complete a piece of work in 20 days and 30 days respectively. They worked together for some time then B left the work. If A completed the rest of the work in 10 days, then B worked for how many days?