The distance between cities A and B is 580 km. A car drove out of town A to town B at a speed of 80 km / h

The distance between cities A and B is 580 km. A car drove out of town A to town B at a speed of 80 km / h, and two hours later a second car drove out of town B towards it at a speed of 60 km / h. How many hours after the departure of the second car will the cars meet?

1) Find the distance to the exit of the second car the first will drive.

Since he will be on the way for 2 hours, we get:

80 * 2 = 160 km.

2) Find the distance between the cars in 2 hours, after the first car leaves.

580 – 160 = 420 km.

3) Determine with what speed the cars will move towards each other.

80 + 60 = 140 km / h.

4) Find the time for which the cars will meet.

We divide 420 km by the approach speed.

420/140 = 3 hours.

Answer:

Cars will meet in 3 hours after 2 cars leave.