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An engine of power 3 MW applies a force ...

An engine of power 3 MW applies a force for 6 minutes on a train moving with a velocity of 10 `ms^(-1)`. If there is no friction and the velocity attained is 25 `ms^(-1)`, find the mass of the train.

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The correct Answer is:
`4.10 xx 10^(6)` kg
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