Question

Как решить эту задачу? За 3 часа работы один экскаватор вынул 555 кубических метров земли. Сколько кубических метров земли вынет второй экскаватор за 4 часа,если в час он вынимает на 15 кубических метров больше, чем первый?

Answer 1

555/3=185 - за час первый,то 185+15=200 за час второй,а за 4 часа 4*200=800

Answer 2

1)555/3=185(куб.метров)за 1 час первый экскаватор
2)185+15=200(куб.метров) за час второй эксковатор
3)200*4=800(куб.метров)за 4 часа
Ответ:800 куб.м
Вроде так

Answer 3

Problem Analysis

To solve this problem, we need to find out how many cubic meters of earth the second excavator will extract in 4 hours, given that it extracts 15 cubic meters more per hour than the first excavator, which extracted 555 cubic meters in 3 hours.

Solution

Let's break down the problem step by step:

1. First, we need to find out how many cubic meters of earth the first excavator extracts per hour. We can do this by dividing the total amount of earth it extracted (555 cubic meters) by the number of hours it worked (3 hours). - The first excavator extracts 185 cubic meters per hour.

2. Next, we need to find out how many cubic meters of earth the second excavator extracts per hour. We know that it extracts 15 cubic meters more per hour than the first excavator. So, we can add 15 to the extraction rate of the first excavator. - The second excavator extracts 200 cubic meters per hour (185 + 15).

3. Finally, we can calculate the total amount of earth the second excavator will extract in 4 hours by multiplying its extraction rate per hour (200 cubic meters) by the number of hours it will work (4 hours). - The second excavator will extract 800 cubic meters of earth in 4 hours.

Answer

The second excavator will extract 800 cubic meters of earth in 4 hours.

Verification

Let's verify the answer using the given information: - The first excavator extracts 185 cubic meters per hour for 3 hours, which gives us a total of 555 cubic meters. - The second excavator extracts 200 cubic meters per hour for 4 hours, which gives us a total of 800 cubic meters.

The answer is consistent with the information provided.

Conclusion

The second excavator will extract 800 cubic meters of earth in 4 hours, given that it extracts 15 cubic meters more per hour than the first excavator, which extracted 555 cubic meters in 3 hours.