Question

Автомашина прошла 240 км. Из них 180 она шла по просёлочной дороге а остальной путь по шоссе. Расход бензина на каждые 10 км. просёлочной дороги составил 1,6 л. а по шоссе на 25% меньше. Сколько литров бензина в среднем расходовалось на каждые 10 км. пути?

Answer 1

1.6/4=0.4л
т.к 25% это 1/4 от 100

Answer 2

Calculation of Average Fuel Consumption

To calculate the average fuel consumption per 10 km of the entire trip, we need to determine the fuel consumption on both the dirt road and the highway.

According to the given information, the car traveled a total distance of 240 km, with 180 km on the dirt road and the remaining distance on the highway.

The fuel consumption on the dirt road was 1.6 liters per 10 km On the other hand, the fuel consumption on the highway was 25% less than that on the dirt road.

To calculate the fuel consumption on the highway, we can multiply the fuel consumption on the dirt road by 0.75 (100% - 25% = 75%).

Let's calculate the average fuel consumption per 10 km:

1. Fuel consumption on the dirt road: 1.6 liters per 10 km. 2. Fuel consumption on the highway: 1.6 liters per 10 km * 0.75 = 1.2 liters per 10 km.

To find the average fuel consumption, we need to calculate the weighted average based on the distance traveled on each type of road.

The weighted average formula is:

Average fuel consumption = (Fuel consumption on the dirt road * Distance on the dirt road + Fuel consumption on the highway * Distance on the highway) / Total distance.

Let's calculate the average fuel consumption:

1. Fuel consumption on the dirt road: 1.6 liters per 10 km. 2. Distance on the dirt road: 180 km. 3. Fuel consumption on the highway: 1.2 liters per 10 km. 4. Distance on the highway: 240 km - 180 km = 60 km. 5. Total distance: 240 km.

Average fuel consumption = (1.6 liters per 10 km * 180 km + 1.2 liters per 10 km * 60 km) / 240 km.

Now, let's calculate the average fuel consumption:

Average fuel consumption = (1.6 * 180 + 1.2 * 60) / 240 = 1.44 liters per 10 km.

Therefore, the average fuel consumption per 10 km of the trip is 1.44 liters.

Please note that the calculations are based on the given information and assumptions made about the fuel consumption on the highway being 25% less than that on the dirt road.