From point A and B, the distance between which is 13.5 km, two pedestrians at the same time

From point A and B, the distance between which is 13.5 km, two pedestrians at the same time came out towards each other with speeds of 5 km / h and 4 km / h. in how many hours will they meet?

1. We take as x time, after which the meeting of the travelers will take place.

2. One of them will pass 5 kilometers during this time, the other will cover 4 kilometers.

3. Considering that the total length of the path of travelers is equal to the distance between the inhabited

points, we compose the equation:

4x + 5x = 13.5;

9x = 13.5;

x = 1.5 hours.

Answer: the meeting of the travelers will take place 1.5 hours after they leave the settlements.