Question

If one person runs 8.1 miles per hour in one direction and another with a speed of 6.3 in an other direction how many hours would have gone by if they are 20.16 miles apart

Answer 1

1.4 hours

Explanation:

Runner A:

Speed = 8.1 mph

Time, = t

Runner B :

Speed = 6.3 mph

Time, = t

Distance apart = 20.16 miles

Distance = speed * time

Distance of Runner A + Distance of runner B = distance apart

8.1t + 6.3t = 20.16

14.4t = 20.16

t = 20.16 / 14.4

t = 1.4 hours

Number of hours, t = 1.4 hours