Question

От двух причалов расстояние между которыми равно 32 км одновременно вышли навстречу друг другу две лодки.первая лодка всё время шла со скоростью 3 км в час а вторая со скоростью 5 км в час. через какое время после выхода лодки встретились.

Answer 1

Ну если течения не было то их скорости тупо суммируются и расстояние делим на них.

(3+5)*х=32
х=32 / (5+3)
х =4
Ответ 4 часа
Но посмотри ответы остальных.
Что то здесь не то

Answer 2

Problem Analysis

We are given two boats that start simultaneously from two docks, and we need to find out when they will meet. The first boat travels at a speed of 3 km/h, and the second boat travels at a speed of 5 km/h. The distance between the docks is 32 km.

Solution

To find out when the two boats will meet, we can use the formula:

Time = Distance / Relative Speed

The relative speed is the sum of the speeds of the two boats. Let's calculate the time it takes for the two boats to meet.

Calculation

The distance between the two docks is 32 km. The first boat travels at a speed of 3 km/h, and the second boat travels at a speed of 5 km/h.

The relative speed of the two boats is:

Relative Speed = Speed of Boat 1 + Speed of Boat 2

Relative Speed = 3 km/h + 5 km/h = 8 km/h

Using the formula, we can calculate the time it takes for the two boats to meet:

Time = Distance / Relative Speed

Time = 32 km / 8 km/h = 4 hours

Therefore, the two boats will meet after 4 hours.

Answer

The two boats will meet after 4 hours.

Explanation

The first boat travels at a speed of 3 km/h, and the second boat travels at a speed of 5 km/h. Since they are traveling towards each other, their relative speed is the sum of their speeds, which is 8 km/h. The distance between the two docks is 32 km. Using the formula Time = Distance / Relative Speed, we can calculate that the two boats will meet after 4 hours.