The Speed of boat in still water is 20 km/hr. It covers (upstream) a distance of 90 km in 12 hours. The speed of the stream is
The speed of the Boat in still water , x = 20km/hr Let the speed of current be y km/hr Now, Upstream speed = 90/12 ∴x-y = 90/12 20 – y = 90/12 y = 20 - 90/12 y = (240-90)/12 = 150/12 = 12.5km/hr
Ratio of the lengths of two trains ‘X’ and ‘Y’ is 3:4 respectively and the ratio of time taken by them to cross a pole is 2:3 respectively. If s...
A train started from station P and preceded towards station Q at a speed of 90 km/h. 42 minutes later, another train started from station Q and preceded...
A train 450 metre long takes 45 sec to cross a man running at a speed of 4 km/hr in the direction same to that of train. What is the speed of the train?
Two trains of same length are running in parallel tracks in the same direction with speed 84 km/hr and 120 km/hr respectively. The latter completely cro...
Ratio of the lengths of two trains ‘X’ and ‘Y’ is 6:7 respectively and the ratio of time taken by them to cross a pole is 4:5 respectively. If s...
How many seconds will a train 60 m in length, travelling at the rate of 40 km an hour, take to pass another train 80 m long, proceeding in the same dire...
1200 metres long train crosses a man who is moving in the same direction with a certain speed in 25 seconds. If the same train can cross a pole in 20 se...
A train can cross a pole in 36 seconds. While if the train increased its speed by 50% then time taken by it to cross 324 metres long platform is 42 seco...
Train M, ‘x’ metres long crosses (x – 30) metres long platform in 20 seconds while train N having the length (x + 30) metres crosses the same plat...
200 metre long train ‘A’ can cross a platform of length 180 metres in 10 seconds. If the speed of train ‘B’ is 6 m/s more than that of train ‘...
