Question

Barbara is kayaking on a river in Clinton County, moving down the river at a speed of 8 miles per hour. Meanwhile, Levi is on a jet ski 5 miles away, moving up the river at 27 miles per hour. How long will it be before the two meet?

Answer 1

1/7 hour

Explanation:

Their closing speed is ...

8 mph + 27 mph = 35 mph

Then the time it takes to cover 5 miles is ...

time = distance/speed

time = (5 mi)/(35 mi/h) = 1/7 h

The two will meet in 1/7 of an hour, about 8 minutes, 34.3 seconds.