Question

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

Answer 1

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

5  = x - y              Add the equations together.

20 = 2x                 Divide by 2

20/2 = x

x = 10