Problema Solution
2 vehicles merge onto highway, A travelling North B South at 3/4 speed. In 90 minutes they are 168 miles apart. What is the speed of each vehicle
Answer provided by our tutors
let 'x' represent the speed of 'A', then the speed of 'B' is '(3/4)x', although the wording of the problem is awkward at best
distance = speed * time
the cummulative rate, since they are travelling in opposite directions, is 'x+(3/4)x'
90 minutes = 1.5 hours
168 = (x+(3/4)x) * 1.5
solving for 'x' we have x=64
64 * (3/4) = 48
vehicle A is travelling north at 64 mph
vehicle B is travelling south at 48 mph