Question

Велосипедист и мотоциклист выехали одновременно из одного пункта в одном направлении . скорость мотоциклиста 40 км ч а велосипедиста 12 км ч . какое расстояние будет между ними через 3 часа . какое расстояние было бы между ними через это же время если бы первоночальное расстояние состовляло 5 км и мотоциклист догонял велосипедиста заранее спасибо

Answer 1

1) 40 * 3 = 120 (км) - проедет мотоциклист за 3 часа
2) 12 * 3 = 36 (км) - проедет велосипедист за 3 часа
3) 120 - 36 = 84 (км) - расстояние между ними через 3 часа

1) 12 * 3 + 5 = 41 (км) - проедет велосепидист за 3 часа с расстоянием 5 км
2) 40 * 3 = 120 (км) - проедет мотоциклист за 3 часа 
3) 120 - 41 = 79 (км)- расстояние
Ответ: 79 километров.
Удачи!

Answer 2

Problem Analysis

We are given the speeds of a cyclist and a motorcyclist who start from the same point and travel in the same direction. We need to find the distance between them after 3 hours. Additionally, if the initial distance between them was 5 km and the motorcyclist catches up to the cyclist, we need to find the distance between them after 3 hours in this scenario as well.

Solution

To find the distance between the cyclist and the motorcyclist after 3 hours, we need to calculate the distance each of them has traveled.

Let's start by calculating the distance traveled by the cyclist. The cyclist's speed is given as 12 km/h, and the time is 3 hours. We can use the formula `distance = speed * time` to calculate the distance traveled by the cyclist: ``` distance_cyclist = 12 km/h * 3 hours = 36 km ```

Next, let's calculate the distance traveled by the motorcyclist. The motorcyclist's speed is given as 40 km/h, and the time is 3 hours. Using the same formula, we can calculate the distance traveled by the motorcyclist: ``` distance_motorcyclist = 40 km/h * 3 hours = 120 km ```

Now, to find the distance between them, we subtract the distance traveled by the cyclist from the distance traveled by the motorcyclist: ``` distance_between = distance_motorcyclist - distance_cyclist = 120 km - 36 km = 84 km ```

Therefore, after 3 hours, the distance between the cyclist and the motorcyclist is 84 km.

Now, let's consider the scenario where the motorcyclist catches up to the cyclist. In this case, the initial distance between them is 5 km. We need to find the distance between them after 3 hours.

To solve this, we can subtract the initial distance between them from the distance calculated above: ``` distance_between_catch_up = distance_between - initial_distance = 84 km - 5 km = 79 km ```

Therefore, after 3 hours, if the motorcyclist catches up to the cyclist, the distance between them is 79 km.

Answer

After 3 hours, the distance between the cyclist and the motorcyclist is 84 km. If the motorcyclist catches up to the cyclist, the distance between them after 3 hours is 79 km.