Question

Грузовая машина за час работы расходует 15л бензина,а легковая-8л.на сколько больше горючего израсходует грузовая машина за 5ч работы,чем легковая?найди два способа решения.

Answer 1

1 СПОСОБ
Вычислим расход горючего грузовой машины за 5 часов
15*5=75 (л)
Вычислим расход горючего легковой машины за 5 часов
8*5=40 (л)
Вычислим разницу
75-40=35 (л)
Ответ: на 35 л горючего грузовая машина израсходует больше,чем легковая машина.

2 СПОСОБ
Вычислим разницу в расходовании горючего
15-8=7 (л)

Вычислим эту разницу за 5 часов
7*5=35 (л)
Ответ: на 35 л горючего 

Answer 2

Problem Analysis

We are given that a truck consumes 15 liters of gasoline per hour of work, while a car consumes 8 liters. We need to find out how much more fuel the truck will consume than the car during 5 hours of work. There are two ways to solve this problem.

Method 1: Direct Calculation

To find the difference in fuel consumption between the truck and the car during 5 hours of work, we can calculate the total fuel consumption for each vehicle and then find the difference.

Let's calculate the total fuel consumption for the truck and the car during 5 hours of work:

- Truck: 15 liters/hour * 5 hours = 75 liters - Car: 8 liters/hour * 5 hours = 40 liters

Therefore, the truck will consume 75 - 40 = 35 liters more fuel than the car during 5 hours of work.

Method 2: Proportional Calculation

Another way to solve this problem is by calculating the ratio of fuel consumption per hour for the truck and the car, and then multiplying it by the total hours of work.

Let's calculate the ratio of fuel consumption per hour for the truck and the car:

- Truck: 15 liters/hour - Car: 8 liters/hour

The ratio of fuel consumption per hour for the truck to the car is 15/8.

Now, let's multiply this ratio by the total hours of work (5 hours) to find the difference in fuel consumption:

Ratio of fuel consumption per hour: 15/8 Total hours of work: 5 hours

Difference in fuel consumption = (15/8) * 5 = 9.375 liters

Therefore, the truck will consume approximately 9.375 liters more fuel than the car during 5 hours of work.

Conclusion

There are two ways to solve the problem of finding the difference in fuel consumption between a truck and a car during 5 hours of work. The first method involves directly calculating the total fuel consumption for each vehicle and finding the difference. The second method involves calculating the ratio of fuel consumption per hour for the truck and the car, and then multiplying it by the total hours of work. Both methods yield the same result, with the truck consuming approximately 35 liters more fuel than the car during 5 hours of work.