In a race of 200 metres, B can give a start of 10 metres to A and C can give a start of 20 metres to B. The start that C can give to A, in the same race, is

Vishnu travelled equal distances at speeds of 10 km/hr, 30 km/hr and 8 km/hr and took a total of 15.5 minute to complete. Find the total distance he travelled in km.

Two men start walking together to a certain destination, one at 6 km/hr and other at 7.5 km/hr. The later arrives an hour before the former. The distance is ?

If the speed of the boat in still water is 20 km / h and the speed of the stream is 5 km / h, then how long will it take for the ferry to travel 100 km with the speed of the stream?

At an average of 80 km/hr Shatabdi Express reaches Ranchi from Kolkata in 7 hrs. Then the distance between Kolkata and Ranchi is

Speed of boat in still water is 9 km/hr. Stream speed initially is 2 km/hr but it increases by 3 km/hr after every hour. Find the time after which boat will come back to the position where it started.(in hour)

A man travelled a distance of 60 kms in 10 hours . He travelled partly on foot at 5 kms per hour and partly on bicycle at 7 kms per hour . What is the distance travelled on foot ? 

The ratio of speeds of A is to B is 2:3 and therefore A takes 20 minutes less time than B takes. What is the ratio of time taken by A and B?