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.

Question

Austin

10 December, 22:53

+4

Answers (1)

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Carrot · Answer 1

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