Question

Две автомашины двужутся навстречу друг другу со скоростями 60км/ч и 80км/ч.Расстояние между ними 500км. Какое расстояние будет между ними через 2ч? через 3ч?

Answer 1

Чтобы узнать как будет уменьшаться расстояние нам надо найти скорость сближения. Это скорость первого+скорость второго.
60+80=140 км/ч
Вместе за 2 часа они проедут 140*2=280 км. За 3 часа - 140*3=420 км.
Из этого получается, что через 2 часа расстояние между ними будет равно 500-280=220 км, а через 3 часа - 500-420=80 км.

Answer 2

Calculation of Distance between Two Cars

To calculate the distance between two cars moving towards each other, we can use the formula:

Distance = (Speed of Car A + Speed of Car B) * Time

Given that the speed of Car A is 60 km/h and the speed of Car B is 80 km/h, and the initial distance between them is 500 km, we can calculate the distance between them after 2 hours and after 3 hours.

Distance after 2 hours:

Using the formula, the distance between the two cars after 2 hours can be calculated as:

Distance = (60 km/h + 80 km/h) * 2 hours

Calculating the above expression:

Distance = (140 km/h) * 2 hours

Distance = 280 km

Therefore, the distance between the two cars after 2 hours will be 280 km.

Distance after 3 hours:

Using the same formula, the distance between the two cars after 3 hours can be calculated as:

Distance = (60 km/h + 80 km/h) * 3 hours

Calculating the above expression:

Distance = (140 km/h) * 3 hours

Distance = 420 km

Therefore, the distance between the two cars after 3 hours will be 420 km.

Please note that these calculations assume that the speeds of the cars remain constant throughout the given time period.