One boat went at a speed of 32 km / h the speed of the other was 4 km less.

One boat went at a speed of 32 km / h the speed of the other was 4 km less. In how many hours would they meet if the distance between the marinas was 240 km?

1) The first step is to determine the speed of the second boat.

32 – 4 = 28.

The second boat was moving at a speed of 28 kilometers per hour.

2) Next, we will compose an equation, where x will be taken as the time spent by the boats until they meet.

x * 32 + x * 28 = 240;

32x + 28x = 240;

60x = 240;

x = 240/60;

x = 4.

Boats will meet in 4 hours after departure.

3) Let’s check the result by substituting it into the initial condition of the problem.

32 * 4 + (32 – 4) * 4 = 240;

128 + 28 * 4 = 240;

128 + 112 = 240;

240 = 240.

Answer: in 4 hours.