Question

Велосипедист и мотоциклист выехали одновременно из одного пункта в одном направлении. Скорость мотоциклиста 40 км.ч.а велосипедиста 12 км .ч. Через сколько часов расстояние между ними будет 56 км?

Answer 1

1) 40*3=120км - проедет за 3 часа мотоциклист
2) 12*3=36 км - проедет за 3 часа велосипедист
3) 120-36=84 км - расстояние между ними через 3 часа
Ответ: расстояние между мотоциклистом и велосипедистом через 3 часа будет 84 км, а если мотоциклист будет догонять велосипедиста, то их расстояние через 3 часа будет 79 км.

Answer 2

Problem Analysis

We are given that a cyclist and a motorcyclist start simultaneously from the same point in the same direction. The motorcyclist's speed is 40 km/h, and the cyclist's speed is 12 km/h. We need to determine how many hours it will take for the distance between them to be 56 km.

Solution

To solve this problem, we can set up an equation based on the relative speeds of the two vehicles. Let's assume that it takes "t" hours for the distance between them to be 56 km.

The distance covered by the motorcyclist in "t" hours is given by: Distance_motorcyclist = Speed_motorcyclist * Time = 40 * t

The distance covered by the cyclist in "t" hours is given by: Distance_cyclist = Speed_cyclist * Time = 12 * t

According to the problem, the distance between them is 56 km. Therefore, we can set up the equation: Distance_motorcyclist - Distance_cyclist = 56

Substituting the expressions for the distances, we get: 40t - 12t = 56

Simplifying the equation, we have: 28t = 56

Dividing both sides of the equation by 28, we find: t = 2

Therefore, it will take 2 hours for the distance between the cyclist and the motorcyclist to be 56 km.

Answer

The distance between the cyclist and the motorcyclist will be 56 km after 2 hours.