It took boat to travel from pier A to pier B 5 hours going upstream. It made the return trip downstream in 3 hours and 30 minute s. What is the distance between two piers, if the speed of the current is 3 mph?
2 answers:
Distance = speed * time Upstream d = 5 * (x - 3) Downstream d = 3.5(x + 3) where d = distance beween piers and x = speed of the boat Equating:- 5x - 15 = 3.5x + 10.5 1.5x = 25.5 so x = 17 mph so d = 5(17) - 15 = 85-15 = 70 miles Answer
9.5 miles, I think. (If not, I'm sorry!)
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