A motorboat travels 540 kilometers in 9 hours going upstream 432 kilometers in 4 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?

Let's say you are paddling at 5mph and the current is 3 mph. Going upstream, you are going 2 mph and downstream, 8 mph.

8(b - c) = 440

9(b + c) = 837

b - c = 55

b + c = 93

Adding the two together...

2b = 148

b = 74

74 - c = 55

c = 19

The boat's speed is 74 mph and the current's speed is 19 mph.

pla·gia·rism

/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

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answer: the answer is b. i think hope i got it correct

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