Janis and Susan are 15 miles apart and are riding bicycles toward each other. If Janis rides at 5 mph and Susan at 4 mph, how long will it take for them to meet each other?
A) $\frac { 5 } { 3 }$ hour
B) $\frac { 3 } { 5 }$ hour
C) 3 hours
D) $\frac { 4 } { 9 }$ hours

Question

Quizplus · Accepted Answer

They are closing the distance between them at a rate of 5 mph + 4 mph = 9 mph. To cover 15 miles at this rate, it takes $ \frac { 15 } { 9 } = \frac { 5 } { 3 } $ hours.

Janis and Susan Are 15 Miles Apart and Are Riding 53\frac { 5 } { 3 }35​

Janis and Susan Are 15 Miles Apart and Are Riding $\frac { 5 } { 3 }$