Acar left town a at 10: 00 am and travelled towards town b at the average speed of 70 km/h. at the same time a truck left town b at an average speed of 50 km/h . if the distance between town a and town b is 420 km, at what time would the car and the truck pass each other?!

The important formula to this problem is  or 

Now, the speed of the car is 70 km/h, and the speed of the truck is 50 km/h. It will take the two vehicles the same amount of time to meet since they both left at the same time. So, since distance equals rate times time, and t = time:

the distance of the car = 70t
the distance of the truck = 50t

Because they both left in opposite directions, and the towns are 420 kilometers apart, the equation for this would be



We now solve the equation.



It will take the vehicles 3 and a half hours to meet. Since we're looking for the time, 3 and a half hours from 10:00 AM is 1:30 PM.

So, the car and the truck will pass each other at 1:30 PM.