Question

Из посёлков Озёрки и Дубки, расстояние между которыми 100 км, вышли одновременно и пошли в одном напровлении две машины: грузовая и легковая. Скорость грузовой машины - 70 км/ч, а легковой, которая догоняет грузовую, - 90 км/ч. Через сколько часов легковая машина догонит грузовую?

Answer 1

90-70=20(км)на 20 км будет уменьшатся расстояние между ними

100/20=5(часа)через 5 часов легковая машина догонит грузовую

100/(90-70)=5

Ответ:через 5 часов.

 

 

 

 

 

 

 

 

Answer 2

Distance and Speed Calculation

The distance between the two villages, Ozyorki and Dubki, is 100 km. A cargo car with a speed of 70 km/h and a passenger car, which catches up with the cargo car, with a speed of 90 km/h are moving in the same direction. We need to find out how many hours it will take for the passenger car to catch up with the cargo car.

Calculation

To calculate the time it takes for the passenger car to catch up with the cargo car, we can use the formula: time = distance / relative speed

The relative speed is the difference between the speeds of the two cars, as they are moving in the same direction.

Solution

Using the given speeds: - Speed of the cargo car = 70 km/h - Speed of the passenger car = 90 km/h - Relative speed = 90 km/h - 70 km/h = 20 km/h

Plugging the values into the formula: time = 100 km / 20 km/h = 5 hours

Therefore, the passenger car will catch up with the cargo car in 5 hours.

This calculation is based on the relative speed and the distance between the two villages, Ozyorki and Dubki.

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