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miv72 [106K]
3 years ago
9

A boat makes a 120-mile trip downstream in 3 hours but makes the return trip in 4 hours. If b = the rate of the boat in still wa

ter and c = the rate of the current, which of the following equations represents the trip downstream?
3(b - c) = 120
3(b + c) = 120
4(b + c) = 120
Mathematics
2 answers:
soldi70 [24.7K]3 years ago
8 0
I think C will be the answer
Snezhnost [94]3 years ago
7 0
The rate downstream = b + c because the water and boat are moving in same direction.

also time downstream = 3 hours

 time * rate = distance 

3 * (b + c)  = 120


so its the second choice.
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