A truck travels distance AB in 30 hours, and a passenger car in 20 hours. The cargo vehicle left A

A truck travels distance AB in 30 hours, and a passenger car in 20 hours. The cargo vehicle left A, and the passenger car left B at the same time towards the exit from B. In how many hours will they meet?

1. Since a truck spends 30 hours for the entire journey, therefore in 1 hour it will cover 1/30 of the journey.

2. Since a passenger car spends 20 hours for the entire journey, it means that in 1 hour it will cover 1/20 of the way.

3. We find out what part of the way the truck and the car, if they move towards each other in 1 hour.

1/30 + 1/20 = 2/60 + 3/60 = 5/60 paths.

4. Now we will find out in how many hours they will meet.

1 / 5/60 = 1 * 60/5 = 12 hours.

Answer: A truck and a car will meet in 12 hours.