From two boat stations, the distance between which is 45 km, two boats left simultaneously towards

From two boat stations, the distance between which is 45 km, two boats left simultaneously towards each other. the speed of the first boat is 7 km / h, the speed of the second is 8 km / h. find the time after which the boats will meet.

1) Let’s find the speed of approach of the boats. When moving towards each other, the speed of approach is equal to the sum of the speeds of moving objects. v = v1 + v2.

7 + 8 = 15 (km / h).

2) Find the time after which the boats will meet. To find the time, the distance must be divided by the speed (in this case, by the speed of the boats approaching).

45:15 = 3 (h).

Answer. Boats meet in 3 hours.