Question

От двух причалов на реке отправились два катера, одни со скоростью 15км/ч, другой 30км/ч. Изначально расстояние между ними было 135км/ч. Через сколько часов, расстояние между ними будет 45км/ч?

Answer 1

1) 30-15=15 км/ч - скорость сближения

2) 135-45=90 (км) - надо пройти 2 катеру

3) 90:15=6 (ч)

Ответ: через 6 часов расстояние между ними будет 45 км

ну или 45 км/ч как у тебя, пиши так я на 100% уверен это правильно.

Answer 2

To find out how many hours it will take for the distance between the two boats to become 45 km, we can set up an equation based on their speeds and the initial distance between them.

Let's assume that the slower boat travels at a speed of 15 km/h and the faster boat travels at a speed of 30 km/h. The initial distance between them is 135 km.

We can represent the time it takes for the distance between them to become 45 km as 't' hours.

Calculating the distance traveled by each boat:

- The slower boat travels at a speed of 15 km/h, so in 't' hours, it will travel a distance of 15t km. - The faster boat travels at a speed of 30 km/h, so in 't' hours, it will travel a distance of 30t km.

Setting up the equation:

The initial distance between the boats is 135 km. After 't' hours, the distance between them will be 45 km. Therefore, we can set up the equation:

135 - (15t + 30t) = 45

Simplifying the equation:

135 - 45t = 45

Now, let's solve for 't':

135 - 45t = 45 90 = 45t t = 90/45 t = 2

Therefore, it will take 2 hours for the distance between the two boats to become 45 km.

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