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trivers5284
22.10.2019 •
Mathematics
Asteamer going downstream traveled the distance between two ports in 3 hours. the return trip took 3 hours 40 minutes. find the speed of the water current if the speed of the steamer in still water is 18 mph.
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Ответ:
1.8 mph
Step-by-step explanation:
If the water's speed is v, and the distance between the ports is d, then:
d = (18 + v) (3)
d = (18 − v) (3⅔)
Set the distances equal:
(18 + v) (3) = (18 − v) (3⅔)
54 + 3v = 66 − 3⅔ v
6⅔ v = 12
v = 1.8
The speed of the water is 1.8 mph.
Ответ: