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lisov135 [29]
3 years ago
11

A boat goes 15 mph in still​ water, and the rate of the current is t mph.

Mathematics
1 answer:
Advocard [28]3 years ago
4 0

Answer:

a) 15-t mph;

b) 15+t mph.

Step-by-step explanation:

a) When the boat travels​ upstream, the current hinders the boat (the speed of the boat decreases). Thus, the speed of the boat upstream becomes

15-t mph.

b) When the boat travels​ downstream, the current helps the boat (the speed of the boat increases). Thus, the speed of the boat downstream becomes

15+t mph.

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Since 270=262+8, and \dfrac{270}9=30, we have

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postnew [5]

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