Question

СОСТАВЬТЕ ПОЖАЛУЙСТА УСЛОВИЕ. От двух пристаней одновременно навстречу друг другу отплыли катер и теплоход. Скорость теплохода 18 км/ч, а катера — 16 км/ч. Через сколько часов они встретятся, если расстояние между пристанями 136 км?​

Answer 1

Ответ:

Пошаговое объяснение:

условие:

v₁=18 км/ч

v₂=16 км/ч

S= 136 км

t=?

решение №1

S=(v₁+v₂)*t

136=(18+16)*t

(18+16)*t=136

34t=136

t=136:34

t=4

решение №2

Vсбл.=v₁+v₂=18+16=34 км/ч

t=S: Vсбл.=136:34=4 (часа)

Answer 2

Ответ:

18 + 16 = 34 (км/ч)

136 : 34 = 4ч

Ответ: через 4 часа они встретятся

Answer 3

Problem Statement

A boat and a motorboat set off from two piers towards each other. The speed of the motorboat is 18 km/h, and the speed of the boat is 16 km/h. How many hours will it take for them to meet if the distance between the piers is 136 km?

Solution

To solve this problem, we can use the concept of relative speed. When two objects are moving towards each other, their relative speed is the sum of their individual speeds.

Let's denote: - Speed of the motorboat = 18 km/h - Speed of the boat = 16 km/h - Distance between the piers = 136 km - Time taken to meet = t hours

The relative speed of the motorboat and the boat is the sum of their speeds: Relative speed = 18 km/h + 16 km/h = 34 km/h

We can use the formula: \[ \text{Distance} = \text{Speed} \times \text{Time} \] to find the time taken for them to meet: \[ \text{Time} = \frac{\text{Distance}}{\text{Relative Speed}} \]

Substituting the given values: \[ \text{Time} = \frac{136 \text{ km}}{34 \text{ km/h}} = 4 \text{ hours} \]

Answer

They will meet in 4 hours.

This means that it will take 4 hours for the boat and the motorboat to meet if the distance between the piers is 136 km.

Source: 'pick_matematika_ru_6_merzlyak - freepidruchnik | PDF' - Page 82