2 years ago

4. A river tour boat is going down a stream to a park for lunch and then back up. It is a 60-mile round trip. On

Mathematics

1 answer:

DiKsa [7]2 years ago

3 0

Answer:

The speed of the boat in still water is 10 miles / hour

Step-by-step explanation:

The trip there, and the trip back are the same -- 30 miles

Let the rate of the boat = x

Let the rate of the water = y

30 = 2*(x + y)

30 = 6*(x - y)

Divide the top equation by 2

Divide the bottom equation by 6

15 = x + y

<u>5 = x - y </u> Add the equations together.

20 = 2x Divide by 2

20/2 = x

x = 10

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