Question

From a point on a straight road, Pablo and Elena ride bicycles in the same direction. Pablo rides at 9 mph and Elena rides at 13 mph. In how many hours will they be 38 mi apart?

Pablo and Elena will be 38 miles apart in ____ hrs.
(Type an integer or a simplified fraction.)

Answer 1

Pablo and Elena will be 38 miles apart in 19/2 hrs.

Explanation:

Their separation speed is 13 mph - 9 mph = 4 mph. Using the relation ...

time = distance/speed

we can find the time from ...

time = (38 mi)/(4 mi/h) = 38/4 h = 19/2 h