Question

from the same starting point jim walks with a speed of 3 mph and john runs 5mph .how long after they begin john covers 5 miles more than jim?

Answer 1

The difference in speed is 2 mi/hr
5/2 = 2.5 hours 

Answer 2

Answer: They begin after 2.5 hours.

Step-by-step explanation:

Since we have given that

Speed at which Jim walks = 3 mph

Speed at which John walks = 5 mph

As they are walking in the same direction.

So, Relative speed would be 5 mph - 3 mph = 2 mph

Distance John covers more than Jim = 5 miles

So, Time taken by them is given by

$time=\dfrac{Distance}{Speed}=\dfrac{5}{2}=2.5\ hours$

Hence, they begin after 2.5 hours.