SOLUTION: A man takes 5 hrs to travel a distance of 12 miles in upstream. If speed of the current is 3 miles/hr then time required to travel 10 miles in downstream is-

Question 822185: A man takes 5 hrs to travel a distance of 12 miles in upstream. If speed of the current is 3 miles/hr then time required to travel 10 miles in downstream is-
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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s = d / t
up:
s - w = 12/5
down:
s + w = 10/t
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s - w = 12/5
s + w = 10/t
---
s - 3 = 12/5
s + 3 = 10/t
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s = 12/5 + 3
s = 10/t - 3
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12/5 + 3 = s = 10/t - 3
12/5 + 6 = s = 10/t
t = 10/(12/5 + 6)
t = 10/(12/5 + 30/5)
t = 10/(42/5)
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answer:
t = 1.1904762 hours
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