Question

Растояние между посёлками А и Б - 40 км. Из посёлка А выехал легковой автомобиль со скоростью 80 км\ч , а из посёлка Б - одновремено грузовой со скоростью 60 км\ч .Через сколько часов легковая машина догонит грузовик.

Answer 1

40/(80+60)=0,28 часа

Answer 2

Calculation of the Time it Takes for the Car to Catch up to the Truck

To calculate the time it takes for the car to catch up to the truck, we need to consider the relative speed between the two vehicles and the distance between the two villages.

Given: - Distance between village A and village B: 40 km - Speed of the car: 80 km/h - Speed of the truck: 60 km/h

To find the time it takes for the car to catch up to the truck, we can use the formula:

Time = Distance / Relative Speed

The relative speed is the difference between the speeds of the car and the truck.

Relative Speed = Speed of the Car - Speed of the Truck

Let's calculate the relative speed:

Relative Speed = 80 km/h - 60 km/h = 20 km/h

Now, we can calculate the time it takes for the car to catch up to the truck:

Time = Distance / Relative Speed

Time = 40 km / 20 km/h = 2 hours

Therefore, the car will catch up to the truck in 2 hours.