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25 January, 10:21

A train needs 4 hours to go from the first station to the second. If the third station is 120 miles away and the total travel time must be no more than 7 hours, write an inequality that would let you find the slowest average speed, v, the train could have.

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  1. 25 January, 12:06
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    The answer is

    v = D/T, T <=7-4=3

    so T=D/v

    3>=120/v implies v>=120/3=40mph

    finally v>=40mph
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Home » Mathematics » A train needs 4 hours to go from the first station to the second. If the third station is 120 miles away and the total travel time must be no more than 7 hours, write an inequality that would let you find the slowest average speed, v, the train
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