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How much the speed of a train be increased if the dirver wishes to reduce the time to reach to a certain station in 20% less time?

[A].	10%	[B].	25%
[C].	5%	[D].	20%
[E].	50%

Answer: Option B

Explanation:

Speed = Distance/Time If the time is to be reduced 20% then the same distance is to be covered in 80% of the time. Therefore Speed = 100/80x100?125% of the original speed. The increase in the speed must be 25%.

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