Problema Solution
Nancy leaves the school and drives toward her town at 27 mph. Greg leaves the same school 2 hours later and drives the same route at 45 mph. How long will it take Greg to pass Nancy?
Answer provided by our tutors
Let
v1 = 27 mph the rate of Nancy
v2 = 45 mph the rate of Greg
t = the time of Greg
t + 2 = the time of Nancy
Since they both travel the same distance, and we know that distance = speed*time we have:
v1(t + 2) = v2*t
27(t + 2) = 45t
........
click here to see the equation solved for t
........
t = 3 hr
Greg will pass Nancy in 3 hours.