Let speed of boat in still water and speed of boat in upstream be ‘5x’ km/h and ‘4x’ km/h, respectively. Speed of stream = 5x – 4x = x km/h Speed of boat in downstream = 5x + x = 6x km/h So, 6x = 360/15 Or, x = 4 Speed of boat in still water = 5 × 4 = 20 km/h Desired time = 15/20 x 60 = 45 minutes
A train Lucknow Express leaves station A at 4 am and reaches station B at 7 am. Another train Kanpur Express leaves station B at 6 am and reaches statio...
A train running with the speed of 38 m/s crosses a man walking with the speed of 5 m/s in the same direction in 10 seconds, find the length of train.
How many seconds will a train 66 m in length, travelling at the rate of 43 km an hour, take to pass another train 86 m long, proceeding in the same dire...
A train 275 metre long takes 30 sec to cross a man running at a speed of 3 km/hr in the direction opposite to that of train. What is the speed of the tr...
If a train takes 24 seconds to cross a pole and 36 seconds to cross a 180 metres long bridge, what is the speed of the train?
A train travelling with a speed of 72 km/h can cross a pole in 8 seconds. Find the time taken by the train to cross a 200 metres long platform if the sp...
A freight train requires 17.6 seconds to pass a stationary person and 28 seconds to traverse a 260-meter-long tunnel. Simultaneously, a motorcycle can c...
Two trains of equal lengths take 10 seconds and 15 seconds respectively to cross a telegraph post. If the length of each train be 240 metres, in what ti...
Speed of train A and train B is 90 km/hr and 36 km/hr respectively. They cross each other in 10 seconds when they are running in opposite directions. Le...
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...
