Question

Помогите с задачей выехал велосипед с скоростью 9 км/ч одновременно навстречу ему выехал велосипед с скоростью 15/ч какое расстояние между ними через 40 минут если расстояние 20 км/ч

Answer 1

15+9=24 (км/ч) скорость сближения
40 мин=2/3 часа
24*2/3=16 (км) проедут за 40 мин
20-16=4 (км)
Ответ: через 40 минут между ними будет 4 км

Answer 2

Problem Analysis

We are given two bicycles traveling towards each other. One bicycle is traveling at a speed of 9 km/h, and the other is traveling at a speed of 15 km/h. We need to find the distance between them after 40 minutes.

Solution

To find the distance between the two bicycles, we can use the formula:

Distance = (Speed1 + Speed2) * Time

Let's calculate the distance using this formula.

Given: - Speed of the first bicycle = 9 km/h - Speed of the second bicycle = 15 km/h - Time = 40 minutes = 40/60 hours (since 1 hour = 60 minutes)

Step 1: Convert the time from minutes to hours: - Time = 40/60 hours = 2/3 hours

Step 2: Calculate the distance using the formula: - Distance = (Speed1 + Speed2) * Time - Distance = (9 + 15) * (2/3) - Distance = 24 * (2/3) - Distance = 16 km

Therefore, the distance between the two bicycles after 40 minutes is 16 km.

Answer

The distance between the two bicycles after 40 minutes is 16 km.