Problema Solution
Robs tractor is just as fast as Erin's. It takes rob 1 hour more than it takes Erin to drive to town. If rob is 24 miles from town and Erin is 12 miles from town, how long does it take Erin to drive to town?
Answer provided by our tutors
Let
v = the rate of each of the tractors
t = Erin's time
t + 1 = Rob's time
d1 = 24 mi the distance that Rob travels
d2 = 12 mi the distance that Erin travels
Since average rate = distance/time we have:
d1/(t + 1) = d2/t
24/(t + 1) = 12/t
........
click here to see the equation solved for t
........
t = 1 hr
Erin needs 1 hour to drive to town.