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And express train travels 40 km distance at a uniform speed if the speed of train had been 20 km/h more than eight would have taken two hours less for same journey find the speed of train?
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And express train travels 40 km distance at a uniform speed if the spe...

Given Data:
- Distance traveled by the express train = 40 km
- Let the speed of the train be x km/h

Time taken by the train to cover 40 km at speed x km/h:
- Time = Distance / Speed
- Time = 40 / x
- Time taken = 40 / x hours

Given condition:
- If the speed of the train had been 20 km/h more, the time taken would have been 2 hours less for the same journey.

Time taken by the train to cover 40 km at speed (x + 20) km/h:
- Time = 40 / (x + 20)
- Time taken = 40 / (x + 20) hours

According to the given condition:
- 40 / x - 40 / (x + 20) = 2

Solving the equation:
- 40(x + 20) - 40x = 2x(x + 20)
- 40x + 800 - 40x = 2x^2 + 40x
- 800 = 2x^2 + 40x
- x^2 + 20x - 400 = 0
- (x + 40)(x - 20) = 0
- x = 20 or x = -40 (Speed cannot be negative)

Speed of the train:
- x = 20 km/h

Therefore, the speed of the express train is 20 km/h.
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