SOLUTION: Please help me solve this word equation using two equations and two variables.
Al travels 600km in 11h, partly by car at 60km/hr and the rest by train at 50km/hr. How long did
Question 756571: Please help me solve this word equation using two equations and two variables.
Al travels 600km in 11h, partly by car at 60km/hr and the rest by train at 50km/hr. How long did he travel by each mode? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! Al travels 600km in 11h, partly by car at 60km/hr and the rest by
train at 50km/hr.
How long did he travel by each mode?
:
Let t = time traveled by train
the total time is 11 hrs, therefore:
(11-t) = time traveled by car
:
Write a dist equation; dist = speed * time
:
train dist + car dist = 600
50t + 60(11-t) = 600
50t + 660 - 60t = 600
50t - 60t = 600 - 660
-10t = -60
t = -60/-10
t = 6 hrs by train
then
11-6 = 5 hrs by car
:
:
check
6*50 = 300 km
5*60 = 300 km
-----------------
total: 600 km
