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Start learning 50% faster. Sign in nowDistance covered upstream in 30/4 minutes = 1/4 Km Distance covered upstream in 1 hour = 1/4× 4/30× 60 = 2 km/hr Distance covered downstream in 5/2 minutes = 1/4 km Distance covered downstream in 1 hour = 1/4 × 2/5× 60 = 6 km/hr Speed of the man in still water = 1/2(2 + 6) = 4 km/hr
Train A running with a sped of 18 km/h crosses a vertical pole in 7 seconds. Speed of train A is 6 m/s less than speed of train B, and length of train B...
A train crosses a pole and a platform of length 576 metres in 12 seconds and 30 seconds, respectively. Find the length of train.
A 160 m long train crosses another 290 m long train running in the opposite direction in 10 seconds. If the shorter train crosses a pole in 8 seconds, w...
A train 480 metre long takes 36 sec to cross a man running at a speed of 7 km/hr in the direction same to that of train. What is the speed of the train?
Two trains A and B, were proceeding in the same direction on parallel tracks at 24 km/hr and 78 km/hr respectively. A man noticed that it took exactly 2...
Train B whose length is (l+40) metre can cross a pole in 20 seconds. Train A can cross 168 metre long platform in 44 seconds. The length of train A is 8...
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...
Train B can cross a ‘d’ meter long platform in 16 seconds. The speed of train B is 40% less than the speed of train A. Train A can cross a pole in 8...
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...
A train takes 7 seconds more to cross a 210-metre-long platform than it takes to cross a pole. If a car running at the speed of 38 m/s takes 70 seconds ...
