Question 201710
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If the distance is the same and the speed increases by a factor of 120/100 = 6/5, then the time required is decreased by a factor of 6/5 -- i.e. multiplied by a factor of 5/6.<br>
(5 minutes) * (5/6) = 25/6 minutes = 4 1/6 minutes = 4 minutes 10 seconds<br>
ANSWER: 4 minutes and 10 seconds<br>