Question

От двух пристаней, находящихся на расстояние 510 км, отплыли в 7 ч навстречу друг другу катер и моторная лодка. Встреча произошла в 24 ч этого же дня. Катер шёл со средней скоростью 19км\ч. С какой скоростью шла моторная лодка.

Answer 1

1) 24-7=17(часов) были в пути                                                                            2) 17*19=323(км) прошел катер                                                                          3) 510-323=187(км) прошла лодка                                                                       4) 187:17=11(км/час) скорость лодки                                                                    Ответ: Лодка шла со скоростью 11(км/час)

Answer 2

Problem Analysis

We are given that a boat and a motorboat departed from two different piers that are 510 km apart and sailed towards each other. They met at 24:00 on the same day. The boat sailed at an average speed of 19 km/h. We need to determine the speed at which the motorboat was traveling.

Solution

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

Speed = Distance / Time

Let's calculate the time it took for the boat and motorboat to meet. Since they departed at 7:00 and met at 24:00, the total time is 17 hours.

Now, let's calculate the distance traveled by the boat. Since the boat and motorboat are traveling towards each other, the total distance traveled by both is equal to the distance between the piers, which is 510 km.

Using the formula, we can find the speed of the motorboat:

Motorboat Speed = Distance / Time

Motorboat Speed = 510 km / 17 hours

Motorboat Speed = 30 km/h

Therefore, the motorboat was traveling at a speed of 30 km/h.

Answer

The motorboat was traveling at a speed of 30 km/h.