Question

Велосипедист выехал вслед за пешеходом ,когда расстояние между ними было равно 2,7км.Через сколько часов велосипедист догонит пешехода ,если его скорость 9,6км/ч ,а скорость пешехода 4,2км/ч

Answer 1

9.6-4.2=5.4км/ч(Скорость сближения)
2.7/5.4=0.5ч(Время)
Ответ: Через 0.5часа

Answer 2

Problem Analysis

We are given the following information: - The distance between the cyclist and the pedestrian is initially 2.7 km. - The cyclist's speed is 9.6 km/h. - The pedestrian's speed is 4.2 km/h.

We need to determine how many hours it will take for the cyclist to catch up to the pedestrian.

Solution

To solve this problem, we can set up an equation based on the relative speeds of the cyclist and the pedestrian.

Let's assume that it takes 't' hours for the cyclist to catch up to the pedestrian. During this time, the cyclist will travel a distance of 9.6t km, and the pedestrian will travel a distance of 4.2t km.

Since the cyclist catches up to the pedestrian, the total distance traveled by the cyclist must be equal to the initial distance between them.

Therefore, we can set up the equation:

9.6t = 2.7 + 4.2t

Now, we can solve this equation to find the value of 't'.

Calculation

Let's solve the equation:

9.6t = 2.7 + 4.2t

9.6t - 4.2t = 2.7

5.4t = 2.7

t = 2.7 / 5.4

t = 0.5

Answer

The cyclist will catch up to the pedestrian in 0.5 hours.

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