Question

Мотоциклист догнал велосипедиста через 0,8 часов. Скорость велосипедиста 12км/ч ,а скорость мотоциклиста 42 км/ч .Какое расстояние было между ними ,когда мотоциклист стал догонять велосипедиста?

Answer 1

(42-12)*0,8=24 километра

Answer 2

Problem Analysis

We are given the speeds of a cyclist and a motorcyclist, and we need to find the distance between them when the motorcyclist catches up to the cyclist.

Solution

To solve this problem, we can use the formula: distance = speed × time.

Let's calculate the distance traveled by the cyclist and the motorcyclist during the 0.8 hours it took for the motorcyclist to catch up to the cyclist.

The speed of the cyclist is given as 12 km/h, and the speed of the motorcyclist is given as 42 km/h.

The time taken is 0.8 hours.

Using the formula, we can calculate the distance traveled by the cyclist and the motorcyclist:

- Distance traveled by the cyclist = speed of the cyclist × time taken - Distance traveled by the motorcyclist = speed of the motorcyclist × time taken

Let's calculate the distances:

- Distance traveled by the cyclist = 12 km/h × 0.8 hours = 9.6 km - Distance traveled by the motorcyclist = 42 km/h × 0.8 hours = 33.6 km

Now, we need to find the distance between them when the motorcyclist catches up to the cyclist. This distance can be calculated by subtracting the distance traveled by the cyclist from the distance traveled by the motorcyclist:

- Distance between them = distance traveled by the motorcyclist - distance traveled by the cyclist

Substituting the values, we get:

- Distance between them = 33.6 km - 9.6 km = 24 km

Therefore, when the motorcyclist catches up to the cyclist, the distance between them is 24 km.