Question 841712: Rae starts on a bicycle trip at 8:00am at the rate of 12km/h. Two hours later Myra starts out at the rate of 18km/h. If both girls maintain their speeds, at what tine will Myra catch up to Rae?
-Thanks
Answer by josgarithmetic(39799)   (Show Source):
You can put this solution on YOUR website! This data table indicates both how the variable, t, is assigned and the expressions for the distance. The times and t are in time QUANTITIES, not as time points on a cock or number line. Just recall that the question is for the TIME ON THE CLOCK, A POINT OF TIME OF THE DAY, so you'll need to make the appropriate adjustment computation after solving for t.
_________________speed____________time___________distance
Rae______________12_______________t+2____________d=12(t+2)
Myra_____________18________________t_____________d=18t
There is a lesson for this form of travel problem:
http://www.algebra.com/tutors/Uniform-Rates-Travel%3A-same-direction-but-different-travel-times-meet-when%3F.lesson?content_action=show_dev
|
|
|
