Let the speed of boat in still water and speed of stream be 'x' km/hr and 'y' km/hr, respectively. According to question; (150/x) - (130/x) = 4 Or, (20/x) = 4 So, x = 5 Now, 8 x (5 + y) = 8 x (5 - y) + 16 Or, 40 + 8y = 40 - 8y + 16 Or, 16y = 16 So, y = 1 So, downstream speed of the boat = (5 + 1) = 6 km/hr And, upstream speed of the boat = (5 - 1) = 4 km/hr Required time taken = (250/6) + (190/4) ~ (42 + 50) ~ 92 hours
Train B which is ‘d’ meter long can cross a pole in 35 seconds. Train A can cross a platform of (d+10) meter long in (t+45) seconds. The ratio betwe...
Train A running at speed of 81 km/hr crosses a platform having twice the length of train in 12 sec. Train B whose length is 360m crosses same platform i...
Gatiman express train crosses a platform in 23 seconds while it can cross a pole in 10 seconds. If the speed of the Gatiman express is 25 m/s, then find...
Train P takes 27 seconds to cross a tree, and Train Q overtakes Train P, both traveling in the same direction, in 3 minutes. The ...
A train whose speed is 40 m/s crosses a bridge in 20 seconds. Another train which is 80m shorter than the first train crosses the same bridge at the sp...
A train can cross a pole, a bridge of 340 meter long and platform of 320 meter long in 12 seconds, _____ seconds and 28 seconds, respectively.
Th...
Two trains A and B started from a point and running perpendicularly. if the speed of train A and train B is 3.5 km/hr and 12 km/hr respectively, find th...
Train M, ‘x’ metres long crosses (x – 30) metres long platform in 22 seconds while train N having the length (x + 30) metres crosses the same plat...
Without stopping the speed of the train is 110 kmph, with stopping the speed of the train is 55 kmph.Find the stop time of the train?
How many seconds will a train 68 m in length, travelling at the rate of 40 km an hour, take to pass another train 92 m long, proceeding in the same dire...
