Problema Solution
If a new road is built, it will take 20 minutes to drive between 2 towns at an average speed of 45 miles per hour. How far apart are these two towns?
Answer provided by our tutors
Let
t = 20 min = 20/60 hr = 1/3 hr the time of the drive
v = 45 mph the average speed
d = the distance between the cities
Since average speed = distance/time we have:
v = d/t multiply both sides by t
d = v*t
d = 45*(1/3)
d = 15 mi
The two towns are 15 miles apart.