Question

Колонна машин движется по шоссе со скоростью 36 км/ч, растянувшись на 2 км. Из хвоста колонны выезжает мотоциклист со скоростью 72 км/ч и движется к голове колонны. За какое время мотоциклист достигнет головы колонны?

Answer 1

Находим скорость мото, относительно колонны: 72-36=36 км/ч
s=v*t - формула пути
2=36*t
t=1/18 часа= 60/18 минут= 20 секунд

Answer 2

Problem Analysis

We are given a scenario where a column of cars is moving at a speed of 36 km/h, stretched out over a distance of 2 km. A motorcyclist emerges from the tail of the column and starts moving towards the head of the column at a speed of 72 km/h. We need to determine how long it will take for the motorcyclist to reach the head of the column.

Solution

To find the time it takes for the motorcyclist to reach the head of the column, we need to calculate the time it takes for the motorcyclist to cover the distance between the tail and the head of the column.

Let's start by calculating the time it takes for the motorcyclist to cover the distance between the tail and the head of the column.

Calculation

The distance between the tail and the head of the column is 2 km.

The speed of the motorcyclist is 72 km/h.

To calculate the time it takes for the motorcyclist to cover the distance, we can use the formula:

Time = Distance / Speed

Substituting the values:

Time = 2 km / 72 km/h

Converting the units to be consistent:

Time = (2 km * 1000 m/km) / (72 km/h * 1000 m/km)

Simplifying:

Time = 2000 m / 72000 m/h

Time = 0.0278 hours

Converting to minutes:

Time = 0.0278 hours * 60 minutes/hour

Time = 1.67 minutes

Therefore, it will take the motorcyclist approximately 1.67 minutes to reach the head of the column.

Answer

The motorcyclist will reach the head of the column in approximately 1.67 minutes.

Note: The sources provided did not contain relevant information for this specific problem. The solution was derived using basic mathematical calculations.