Question

Расстояние между двумя машинами,движущимися по шоссе , 100км.Скорости манин 80км/ч и 60км/ч.Какое расстояние будет между ними через час, если машины едут:1)в одном направлении2)навстречу друг другу?

Answer 1

2)80+60=240- S сближения 

   140-100=40 

1)80-60=20 км/ч скорость сближения 

100-20=80 км  будет растояние между ними 

Answer 2

Calculation of Distance between Two Cars

To calculate the distance between two cars moving on a highway, we need to consider their speeds and the time they have been traveling. Let's calculate the distance between two cars moving at speeds of 80 km/h and 60 km/h respectively, after one hour, in two different scenarios:

1) Cars moving in the same direction:

When the cars are moving in the same direction, the relative speed between them is the difference between their speeds. In this case, the relative speed is 80 km/h - 60 km/h = 20 km/h.

To calculate the distance between the cars after one hour, we multiply the relative speed by the time traveled:

Distance = Relative Speed * Time

Distance = 20 km/h * 1 hour = 20 km

Therefore, the distance between the two cars after one hour, when they are moving in the same direction, is 20 kilometers.

2) Cars moving towards each other:

When the cars are moving towards each other, the relative speed between them is the sum of their speeds. In this case, the relative speed is 80 km/h + 60 km/h = 140 km/h.

To calculate the distance between the cars after one hour, we multiply the relative speed by the time traveled:

Distance = Relative Speed * Time

Distance = 140 km/h * 1 hour = 140 km

Therefore, the distance between the two cars after one hour, when they are moving towards each other, is 140 kilometers.

Please note that these calculations assume constant speeds and no changes in direction or acceleration during the one-hour period.