Unitary Method ...

The speeds of two trains are in the ratio of 3:5. If the speed of the 1st train is 15 km/hr, then what is the speed of the second train?

Two stations A and B are 100 km apart on astraight line. One train starts from A at 7 a.m. and travels towards B at 10km/h. Another train starts from B at 8 a.m. and travels towards A at a speed of20 km/h. At what time will they meet?

Acar travels the first half of a certain distance with a speed of 20 km/hr, thenext half with a speed of 20 km/hr and the last half distance with a speed of 30km/hr The average speed of the car for the whole journey is

A car starts from Bengaluru, goes 100 km in astraight line towards south, immediately turns around and returns to Bengaluru.The time taken for this round trip is 4 hours. The magnitude of the averagevelocity of the car for this round trip

A man car covers 14 km in 8 hours.His speed in m/min is:

Two persons A and B are 400 m apart.If A can run at the speed of 5 m/sec and B can run at the speedof 3 m/sec; Find in how much time will they meet each other, if theyrun in the opposite directions?

Speed of boat in still water is 4 km/h.The river is flowing with a speed of 3 km/h and time taken tocover a certain distance upstream is 2 h more than time taken tocover the same distance downstream. Find the distance.

A car travels 72 km in 2 hrs.The distance that can be travelled by the car in 4 hr is

Ifa student walks from his house to school at 4 km/h, he is late by 35 minutes.However, if he walks at 5 km/h, he is late by 5 minutes only. The distance ofhis school from his house is:

Excluding stoppages, the speed of a bus is 60km/h and including stoppages, it is 54 km/h. For how many minutes does the busstop per hour?

A can run 1 km in 5 min 54 sec and B in 6 min.How many metres start can A can give B in a km race so that the race may end ina dead heat?

A car travels a distance of 600 km at a uniformspeed. If the speed of the car is 10 kmph more, it takes three hours less tocover the same distance. The original speed of the car is

A farmertravelled a distance of 51 km in 10 hours. He travelled partly on foot at 5km/hr and partly on bicycle at 10 km/hr. The distance travelled on foot is

In a 350 m race A beats Bby 17.5 m or 5 seconds. B's time over the course is:

A train 150 m long, passes a telegraphpost in 15 sec. Find time taken by it to pass a platform 180 mlong.