Question

Велосипедист и мотоциклист выехали одновременно из одного пункта в одном направлении. Скорость мотоциклиста 40км. ч.,а велосипедиста 12 км. ч..Какова скорость их удаления друг от друга? Через сколько часов расстояние между ними будет 84 км? нарисуйте схему и объясните решение задачи. 1)40-12=28(км\ч) 2)84:28= 3(ч) Ответ :3 часа

Answer 1

Велосипедист  за час проезжает 12 км
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Мотоциклист за час проезжает 40 км
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За счет этого происходит удаление  мотоциклиста от велосипедиста на 40-12=28 км в час.
За два часа это удаление увеличится и станет равным 56 км
А за три часа-  84 км.

Answer 2

Problem Statement

A cyclist and a motorcyclist set off simultaneously from the same point in the same direction. The speed of the motorcyclist is 40 km/h, and the speed of the cyclist is 12 km/h. What is the speed at which they are moving away from each other? How many hours will it take for the distance between them to be 84 km?

Solution

To find the speed at which they are moving away from each other, we need to calculate the relative speed. The relative speed is the difference between the speeds of the motorcyclist and the cyclist.

The speed of the motorcyclist is 40 km/h, and the speed of the cyclist is 12 km/h. Therefore, the relative speed is 40 km/h - 12 km/h = 28 km/h.

To find the time it takes for the distance between them to be 84 km, we can use the formula: time = distance / relative speed.

Substituting the values, we get: time = 84 km / 28 km/h = 3 hours.

Therefore, it will take 3 hours for the distance between them to be 84 km.

Diagram

Here is a diagram to help visualize the problem:

Motorcyclist ----> 40 km/h
Cyclist ---------> 12 km/h

Summary

- The speed at which the motorcyclist and cyclist are moving away from each other is 28 km/h. - It will take 3 hours for the distance between them to be 84 km.

I hope this helps! Let me know if you have any further questions.