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2 years ago

7

a boy swims down stream at 0.9 miles in the same amount of time that he can swim 0.6 miles up stream. if the rate of the current

is 1.5 mph, how fast can he swim in the water?

1 answer:

AnnyKZ [126]2 years ago

3 0

Let s be the boy's swim speed. Then:
.9/s+1.5=.6/s-1.5
.6s+.9=.9s-1.35
.3s=2.25
s=7.5 mph as the boy's swimming speed
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