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Pie
3 years ago
11

The speed of a boat in still water is 20 mph. it travels from one pier to another with the current in 4 hours and back against t

he current in 6 hours and 40 minutes. if the distance between piers is 100 miles, what is the speed of the current
Physics
1 answer:
saw5 [17]3 years ago
3 0
The answer is, "the speed of the current is 5 miles per hour."

To calculate the speed of the current,
let's assume speed of current =  xmph. Time taken to travel from one pier to another with the current = 100/(20+x)h


But the time taken to travel from one pier to another with the current, which is given is = 4 hours. So,  4=100/(20+x) 80+4x = 100

4x = 20

x = 5 Thus, the speed of the current is 5 miles per hour.
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