Question

Помогите режить задачу на скорость! велосипедист ехал 3 ч со скоростью 18км/ч.обратно длиннее первой на 9 км,но и скорость велосипедиста на обратном пути!помоги решить

Answer 1

18*3=54км расстояние туда
54+9=63км расстояние обратно
18+3=21км/час скорость обратно
63:21=3 часа ехал обратно

Answer 2

Problem Analysis

We have a cyclist who traveled for 3 hours at a speed of 18 km/h. On the return trip, the distance was 9 km longer than the first trip, but we don't know the speed of the cyclist on the return trip. We need to find the speed of the cyclist on the return trip.

Solution

Let's break down the problem and solve it step by step.

1. Let's denote the speed of the cyclist on the return trip as x km/h. 2. We know that the cyclist traveled for 3 hours at a speed of 18 km/h on the first trip. Therefore, the distance covered on the first trip is given by: - Distance = Speed * Time - Distance = 18 km/h * 3 h - Distance = 54 km

3. We also know that the distance on the return trip is 9 km longer than the first trip. Therefore, the distance covered on the return trip is given by: - Distance = Distance on first trip + 9 km - Distance = 54 km + 9 km - Distance = 63 km

4. Now, we can use the formula for distance to find the speed on the return trip: - Distance = Speed * Time - 63 km = x km/h * 3 h

5. Solving for x, we can divide both sides of the equation by 3: - x km/h = 63 km / 3 h - x km/h = 21 km/h

Answer

The speed of the cyclist on the return trip is 21 km/h.

Please let me know if you need any further assistance!