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madam [21]
2 years ago
7

The current of a river is 3 miles per hour. A boat travels to a point 176 miles upstream and 176 miles back in 19 hours. What is

the speed of the boat to the nearest tenth in water without a current?
Mathematics
1 answer:
serious [3.7K]2 years ago
4 0

Answer:

If I am understanding your question, the total upstream is 8 miles and another 8 miles downstream.

Let s = the speed of the boat in still water

d = rt

8 = 5(s + 3)  downstream

8 = 5s + 15  equation 1

8 = 5(s - 3)   upstream

8 = 5s - 15    Add equation 1

8 = 5s + 15 

16 = 10s    Divide both sides by 10.

s = 16/10 = 8/5 = 1.6 mph

 

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34

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2

+

2

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−

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8

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2

y

=

−

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−

7

,

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)

is:

y

=

−

4

x

2

−

32

x

−

62

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