Question

Из двух городов расстояние между которыми 448км, выезжают навстречу друг другу два автомобиля:один со скоростью 60км/ч. А второй 80км/ч. Через сколько часов они встретятся!?

Answer 1

60+80=140-средняя скорость
448:140=3,2 ч

Answer 2

60*t+80*t=448
140 t=448
t=448 : 140
t=3,2 часа

Answer 3

Calculation of the Meeting Time

To calculate the time it takes for the two cars to meet, we can use the formula:

Time = Distance / Relative Speed

Given that the distance between the two cities is 448 km and the cars are traveling towards each other, we need to find the relative speed of the two cars.

The first car is traveling at a speed of 60 km/h, and the second car is traveling at a speed of 80 km/h. To find the relative speed, we can add the speeds of the two cars together:

Relative Speed = Speed of Car 1 + Speed of Car 2

Relative Speed = 60 km/h + 80 km/h

Relative Speed = 140 km/h

Now, we can calculate the time it takes for the two cars to meet:

Time = Distance / Relative Speed

Time = 448 km / 140 km/h

Time = 3.2 hours

Therefore, the two cars will meet after approximately 3.2 hours.

Please note that the above calculation assumes that the cars maintain a constant speed throughout the journey and that there are no other factors affecting their travel time.