Question

Грузовик за день проехал 240 км.1/3 пути он ехал по грунтовой дороге со скоростью 40 км\ч ,а остальной путь -по шоссе со скоростью 80км\ч.Сколько часов грузовик был в пути ?

Answer 1

1) 240:3:40= 2- часа ехал грузовик по грунтовой дороге.
2) 240:3*2=160 км он ехал по шоссе.
3) 160:80=2- часа ехал он по шоссе.
4) 2 плюс 2=4- часа грузовик был в пути.
Ответ: 4 часа.

Answer 2

Calculation of the Total Time the Truck Was on the Road

To calculate the total time the truck was on the road, we need to determine the time it took for the truck to travel on the dirt road and the time it took for the truck to travel on the highway.

Let's start by calculating the time it took for the truck to travel on the dirt road.

Given: - Distance traveled on the dirt road = 1/3 of the total distance = 240 km - Speed on the dirt road = 40 km/h

To calculate the time, we can use the formula: time = distance / speed.

Substituting the values, we get: time on dirt road = 240 km / 40 km/h = 6 hours.

Next, let's calculate the time it took for the truck to travel on the highway.

Given: - Distance traveled on the highway = 2/3 of the total distance = 2/3 * 240 km = 160 km - Speed on the highway = 80 km/h

Using the same formula, we can calculate: time on highway = 160 km / 80 km/h = 2 hours.

Now, we can find the total time the truck was on the road by adding the time on the dirt road and the time on the highway: total time = time on dirt road + time on highway = 6 hours + 2 hours = 8 hours.

Therefore, the truck was on the road for 8 hours.