Question

Из двух посёлков, удаленных друг от друга на расстояние 360 км одновременно навстречу друг другу выехали два мотоциклиста и встретились через 4 часа. Скорость 1 мотоциклиста 42км/ч.с какой скоростью ехал 2 мотоциклист? На каком расстоянии друг от друга были мотоциклисты через 3 часа после выезда?

Answer 1

Ответ:

1)узнаем скорость сближения:  

360/4=90 км/ч  

2)узнаем на каком расстоянии друг от друга были мотоциклисты через 3 часа после выезда?  

90*3=270 км.  

3)узнаем скорость второго мотоциклиста:  

90 км/ч - 42 км/ч = 48 км/ч

Пошаговое объяснение:

Answer 2

Problem Analysis

We have two motorcyclists who start simultaneously from two villages that are 360 km apart and meet after 4 hours. The speed of the first motorcyclist is given as 42 km/h. We need to find the speed of the second motorcyclist and the distance between them after 3 hours.

Finding the Speed of the Second Motorcyclist

To find the speed of the second motorcyclist, we can use the formula:

Speed = Distance / Time

Let's denote the speed of the second motorcyclist as 'x'. We know that the distance between the two villages is 360 km and the time taken to meet is 4 hours. Using the formula, we can set up the following equation:

42 km/h + x km/h = 360 km / 4 hours

Simplifying the equation, we get:

42 km/h + x km/h = 90 km/h

Now, we can solve for 'x' by subtracting 42 km/h from both sides of the equation:

x km/h = 90 km/h - 42 km/h

Simplifying further, we find:

x km/h = 48 km/h

Therefore, the second motorcyclist was traveling at a speed of 48 km/h.

Finding the Distance Between the Motorcyclists After 3 Hours

To find the distance between the motorcyclists after 3 hours, we can use the formula:

Distance = Speed * Time

Let's denote the distance between the motorcyclists after 3 hours as 'd'. We know that the speed of the first motorcyclist is 42 km/h and the time elapsed is 3 hours. Using the formula, we can set up the following equation:

d = 42 km/h * 3 hours

Simplifying the equation, we find:

d = 126 km

Therefore, the motorcyclists were 126 km apart after 3 hours.

Summary

To summarize: - The second motorcyclist was traveling at a speed of 48 km/h. - The motorcyclists were 126 km apart after 3 hours.

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