Question

Велосипедист спускается с горы за 2 минуты, затем ещё проезжает 500м. за 100 секунд.его средняя скорость 18 км/ч Найти длину горы​

Answer 1

Ответ:

Дано                                        vсер=l1+l2\t1+t2

                                                  vсер=l1\t1         l1=vсер*t1                

t1=120c

l2=500м                                     l1=5м\с*120с=600м

t2=100с

v сер=5м\с

_____________Відповідь . Довжина гори 600метрів

l2-?

Объяснение:

з умови задачі нам дано час першої ділянки  2хв переводимо в секунди 120 секунд.другий шлях =500м. другий час 100с. середня швидкість 18 км\год перетворимо в м\с і це дорівнює 5м\с.

Answer 2

Problem Analysis

We are given the following information: - The cyclist descends from the mountain in 2 minutes. - After descending, the cyclist travels an additional 500 meters in 100 seconds. - The average speed of the cyclist is 18 km/h.

We need to find the length of the mountain.

Solution

To find the length of the mountain, we can use the formula:

Distance = Speed × Time

Let's calculate the distance covered during the descent from the mountain and the distance covered after the descent.

1. Distance covered during the descent: - Time = 2 minutes = 2 × 60 seconds = 120 seconds - Speed = Average speed = 18 km/h - Distance = Speed × Time

2. Distance covered after the descent: - Time = 100 seconds - Speed = Average speed = 18 km/h - Distance = Speed × Time

To find the length of the mountain, we need to add the distance covered during the descent and the distance covered after the descent.

Let's calculate the distances:

1. Distance covered during the descent: - Time = 120 seconds - Speed = 18 km/h - Distance = Speed × Time

2. Distance covered after the descent: - Time = 100 seconds - Speed = 18 km/h - Distance = Speed × Time

Finally, we can find the length of the mountain by adding the two distances calculated above.

Calculation

1. Distance covered during the descent: - Time = 120 seconds - Speed = 18 km/h - Distance = Speed × Time

2. Distance covered after the descent: - Time = 100 seconds - Speed = 18 km/h - Distance = Speed × Time

3. Length of the mountain: - Length = Distance covered during the descent + Distance covered after the descent

Let's calculate the distances and the length of the mountain.

Distance covered during the descent: - Time = 120 seconds - Speed = 18 km/h

Distance = Speed × Time

Distance covered after the descent: - Time = 100 seconds - Speed = 18 km/h

Distance = Speed × Time

Length of the mountain: - Length = Distance covered during the descent + Distance covered after the descent

Calculation

1. Distance covered during the descent: - Time = 120 seconds - Speed = 18 km/h - Distance = Speed × Time

Substituting the values: Distance = 18 km/h × 120 seconds

Converting time to hours: Distance = 18 km/h × (120 seconds / 3600 seconds/hour)

Simplifying: Distance = 18 km/h × 0.0333 hours

Calculating: Distance = 0.6 km

2. Distance covered after the descent: - Time = 100 seconds - Speed = 18 km/h - Distance = Speed × Time

Substituting the values: Distance = 18 km/h × 100 seconds

Converting time to hours: Distance = 18 km/h × (100 seconds / 3600 seconds/hour)

Simplifying: Distance = 18 km/h × 0.0278 hours

Calculating: Distance = 0.5 km

3. Length of the mountain: - Length = Distance covered during the descent + Distance covered after the descent

Substituting the values: Length = 0.6 km + 0.5 km

Calculating: Length = 1.1 km

Therefore, the length of the mountain is 1.1 kilometers.

Answer

The length of the mountain is 1.1 kilometers.