Asked by Lizzy

The time it takes Javier to go to school and his walking rate are inversely proportional. If it takes him 12 mins walking at 3 mph how long does it take if he walks at 4 mph?

Answers

Answered by Steve
t = k/r

12 = k/3
k = 36

t = 36/r

when r=4,

t=36/4 = 9 min
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