Question

От двух пристаней одновременно навстречу друг другу отошли два катера.Скорость первого катера 18км/ч,скорость другого 15км/ч. Через сколько часов катера встретятся,если расстояние между пристанями 132 км?

Answer 1

1) Находим скорость сближения, для этого складываем скорости катеров  18 + 15  = 33 (км/ч)
2) Время встречи находим по формуле: t = S: V , где t - время ; S - расстояние; V - скорость сближения
t = 132 : 33
t = 4 (ч.)
ОТВЕТ: катера встретятся через 4 часа.
 

Answer 2

Problem Analysis

We have two boats that start from two different docks and move towards each other. The speed of the first boat is 18 km/h, and the speed of the second boat is 15 km/h. We need to find out how many hours it will take for the boats to meet if the distance between the docks is 132 km.

Solution

To find the time it takes for the boats to meet, we can use the formula:

Time = Distance / Relative Speed

The relative speed is the sum of the speeds of the two boats since they are moving towards each other.

Let's calculate the time it takes for the boats to meet.

Calculation

Given: - Speed of the first boat = 18 km/h - Speed of the second boat = 15 km/h - Distance between the docks = 132 km

Relative Speed = Speed of the first boat + Speed of the second boat

Relative Speed = 18 km/h + 15 km/h = 33 km/h

Time = Distance / Relative Speed

Time = 132 km / 33 km/h

Time = 4 hours

Answer

The boats will meet after 4 hours.