Question

От одной пристани до другой, расположенных на озере, в 12 часов 30 минут вышел теплоход, прошёл 30 км, затем сделал остановку на полчаса и прошёл ещё 15 км, прибыв к другой пристани в 14 часов 30 минут. Найдите скорость теплохода, если она была постоянной.

Answer 1

1) 30км+15км=45км
2) 14ч.30м.-12ч.30м.=2ч
3) 2ч.-30м.=1ч.30м.
4) 45÷1.5=30км/ч
Ответ:30км/ч

Answer 2

Problem Analysis

We are given the following information: - A ship departed from one pier to another on a lake. - The ship traveled for 30 km and then made a 30-minute stop. - After the stop, the ship traveled an additional 15 km. - The ship arrived at the second pier at 14:30.

We need to find the speed of the ship, assuming it was constant throughout the journey.

Solution

To find the speed of the ship, we can use the formula:

Speed = Distance / Time

Let's calculate the time it took for the ship to travel from the first pier to the second pier.

The ship traveled 30 km before the stop and an additional 15 km after the stop, for a total distance of 30 km + 15 km = 45 km.

The time it took for the ship to travel from the first pier to the second pier can be calculated as follows:

Time = Departure Time + Travel Time + Stop Time

The departure time is 12:30, and the arrival time is 14:30. Therefore, the travel time is 14:30 - 12:30 = 2 hours.

The stop time is 30 minutes, which is equivalent to 0.5 hours.

Therefore, the total time is 2 hours + 0.5 hours = 2.5 hours.

Now we can calculate the speed of the ship:

Speed = Distance / Time = 45 km / 2.5 hours = 18 km/h

Therefore, the speed of the ship was 18 km/h.

Conclusion

The speed of the ship, assuming it was constant throughout the journey, was 18 km/h