Two piers, A and B, are located s km away from each other along a river. A motor boat, with a speed of vkm/hour in still water, is cruising between the two piers. How much time t (in hours) will the motorboat need to get from pier A to pier B and back, if the speed of the current is 5km/hour? Find t if:

Question

Mareli Novak

Mathematics

2 November, 21:42

Two piers, A and B, are located s km away from each other along a river. A motor boat, with a speed of vkm/hour in still water, is cruising between the two piers. How much time t (in hours) will the motorboat need to get from pier A to pier B and back, if the speed of the current is 5km/hour? Find t if:

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Answers (2)

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Cherish Lee · Answer 1

25/6 Hours (I made a chart)

Distance:

There = 50

Back = 50

Rate (speed):

There = 25+5

Back = 25-5

50/25+5 = 50/30 = 5/3

50/25-5 = 50/20 = 5/2

5/3+5/2 = Total Time

Total Time = 25/6 Hours

Cassius Hatfield · Answer 2

If s is 5 than the time would be 1 hour if it's not than you divide what s is by 5 to find t