Solve the problem.
-From a point on a river, two boats are driven in opposite directions, one at 9 miles per hour and the other at 6 miles per hour. In how many hours will they be 60 miles apart?
A) $4 \mathrm{hr}$
B) $5 \mathrm{hr}$
C) $6 \mathrm{hr}$
D) $1 \mathrm{hr}$

Question

Quizplus · Accepted Answer

The boats are moving in opposite directions, so their speeds add. The total speed is 9 + 6 = 15 miles per hour. To find the time it will take them to be 60 miles apart, we divide the distance by the speed: 60 / 15 = 4 hours.

Solve the Problem 4hr4 \mathrm{hr}4hr B) 5hr5 \mathrm{hr}5hr C) 6hr6 \mathrm{hr}6hr D) 1hr1 \mathrm{hr}1hr

Solve the Problem $4 \mathrm{hr}$ B) $5 \mathrm{hr}$ C) $6 \mathrm{hr}$ D) $1 \mathrm{hr}$