A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them. What is the speed of the train if both the persons are ?->(Show Answer!)

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A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them. What is the speed of the train if both the persons are ?->(Show Answer!)

Question Set

1. A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them. What is the speed of the train if both the persons are walking in the same direction as the train?

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By: guest on 01 Jun 2017 05.48 pm

4.5 km/hr = 4.5 x 5 m/sec = 5 m/sec = 1.25 m/sec, and 18 4 5.4 km/hr = 5.4 x 5 m/sec = 3 m/sec = 1.5 m/sec. 18 2 Let the speed of the train be x m/sec. Then, (x - 1.25) x 8.4 = (x - 1.5) x 8.5 8.4x - 10.5 = 8.5x - 12.75 0.1x = 2.25 x = 22.5 Speed of the train = 22.5 x 18 km/hr = 81 km/hr. 5

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