alleryA car that usually takes 6 hours for a trip now takes 4 hours due to a higher speed. By what factor did the speed increase?
A$3/2$ times
B$4/3$ times
C$2/3$ times
D$5/4$ times
Answer & Solution
Correct answer: A. $3/2$ times
For fixed distance, speed ratio = inverse time ratio.
New time / old time = 4/6 = 2/3, so new speed / old speed = 6/4 = 3/2 (i.e., the speed became 1.5 times the original).
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