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A man covered a certain distance at some speed. Had he moved 3kmph faster, he would have taken 40 minutes less. If he had moved 2 kmph, slower, he would have taken 40 minutes more. The distance (in km) is :

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Important Questions on Work, Time, Distance and Speed

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In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/h and the flight increased by 30 min. The duration of the flight is
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Robert is traveling on his cycle and has calculated to reach point A at 2 P.M. if he travels at 10 km/h, he will reach there at 12 noon if he travels at 15 km/h. At what speed must he travel to reach A at 1 P.M.?

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Asha drives to work at an average speed of 48 km per hour. The time taken to cover the first 60% of the distance is 10 minutes more than the time taken to cover the remaining distance. How far is her office?
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The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
HARD
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A train passes a platform 110 m long in 40 s and a boy standing on the platform in 30 s. The length of the train is _____.
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A train moving with uniform speed crosses a pole in 2 s and a 250 m long bridge in 7 s. Find the length of the train.
EASY
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Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is:

EASY
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Two trains of equal length are running on parallel lines in the same direction at 46 km/h and 36 km/h. The faster train passes, the slower train in 36 s. The length of each train is :