SOLUTION: A bus and a car traveled a distance of 140km from town A to town B. The car left town A 45 minutes after the bus, but it reached town B 15 minutes earlier than the bus. If the aver

Question 1053620: A bus and a car traveled a distance of 140km from town A to town B. The car left town A 45 minutes after the bus, but it reached town B 15 minutes earlier than the bus. If the average speed of the bus was 60 km/hr what was the average speed of the car?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the average speed of the car in km/hr
Let = the time in hrs the car takes to get to town B
--------------------------------------
How far did the bus get in the 1st 45 min?

km
-----------------------
Start a stop watch when the car leaves town A
Let = time in hrs on stop watch when car
gets to town B
-----------------------
Equation for the car:
(1)
Equation for the bus:
(2)
---------------------------------
(2)
(2)
(2)
and
(1)
(1)
(1)
(1)
-----------------------
The average speed of the car is 105 km/hr
------------------------
check answer:
The total time for the bus is:

--------------------
The bus travels km for hrs

OK

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