Question

A train covers a distance of 1500 km at a constant speed. if the speed of the train would have been 20 km/hr more, then it would have taken 20 hours less to cover the same distance. what is the original speed of the train?

Answer 1

Distance travelled = 1500 km
Let the original speed of train be x kmph

Given that the speed of the train is increased by 20 km an hour.
Hence the new speed is (x + 20) kmph
Time taken to cover 1500 km = 1500/(x+20)�
Given that the time taken is 20 hours less when compared to the previous time.

Since speed cannot be negative, hence the original speed of train is 75 kmph.

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Answer 2

Answer:

Given that the speed of the train is increased by 20 km an hour.

Given that the time taken is 20 hours less when compared to the previous time.

Since speed cannot be negative, hence the original speed of train is 75 kmph.