Question

№1376.задача:автомашина шла по шоссе 3 ч со скоростью 65,8 км/ч, а затем 5 ч она шла по грунтовой дороге. С какой скоростью она шла по грунтовой дороге, если весть путь равен 324,9 км/ч? решите пожалйуста прямо сейчас...очень надо.

Answer 1

1)3*65,8=197,4(км)-по шоссе

2)324,9-197,4=127,5(км)-по грунтовой дороге

3)127,5:5=25,5(км/ч)-скорость машины по грунтовой дороге

Answer 2

1. 65,8*3=197,4

2.324,9-197,4=127,5

3.127,5/5=25,5 км/час шла по грунтовой дороге

Answer 3

Problem Analysis

We are given that a car traveled on a highway for 3 hours at a speed of 65.8 km/h, and then traveled on a dirt road for 5 hours. We need to find the speed at which the car traveled on the dirt road, given that the total distance traveled is 324.9 km.

Solution

To solve this problem, we can use the formula: speed = distance / time.

Let's calculate the distance traveled on the highway and the distance traveled on the dirt road.

The distance traveled on the highway can be calculated as follows: distance_highway = speed_highway * time_highway.

Substituting the given values, we have: distance_highway = 65.8 km/h * 3 hours.

Now, let's calculate the distance traveled on the dirt road: distance_dirt_road = total_distance - distance_highway.

Substituting the given values, we have: distance_dirt_road = 324.9 km - (65.8 km/h * 3 hours).

Finally, we can calculate the speed on the dirt road: speed_dirt_road = distance_dirt_road / time_dirt_road.

Substituting the given values, we have: speed_dirt_road = (324.9 km - (65.8 km/h * 3 hours)) / 5 hours.

Now, let's calculate the speed on the dirt road.

Calculation

Using the given values, we can calculate the speed on the dirt road as follows:

distance_highway = 65.8 km/h * 3 hours = 197.4 km.

distance_dirt_road = 324.9 km - 197.4 km = 127.5 km.

speed_dirt_road = 127.5 km / 5 hours = 25.5 km/h.

Answer

The car traveled on the dirt road at a speed of 25.5 km/h.

Please note that the calculations provided are based on the information given in the problem statement.