Question

Рабочий покрывают лаком пол площадью 36 метров квадратных за 45 минут Какую площадь покрывает лаком за одну минуту за сколько минут рабочий покрывают лаком 20 метров квадратных пола

Answer 1

72/45=1,6 м рабочий покрывает за минуту
20/72*45=12,5 минут рабочий тратит на 20 метров
/-это делить
*-это умножить

Answer 2

Calculation of Coverage Area and Time

To calculate the coverage area and time, we need to determine the rate at which the worker covers the floor with lacquer.

Let's assume that the worker covers a floor area of 36 square meters in 45 minutes.

To find the coverage area per minute, we divide the total coverage area by the total time:

Coverage area per minute = Total coverage area / Total time

Coverage area per minute = 36 square meters / 45 minutes

Now, let's calculate the coverage area per minute:

Coverage area per minute = 0.8 square meters per minute.

Calculation of Time to Cover 20 Square Meters

To find out how long it takes for the worker to cover 20 square meters of the floor, we can use the coverage area per minute we calculated earlier.

To calculate the time, we divide the desired coverage area by the coverage area per minute:

Time = Desired coverage area / Coverage area per minute

Time = 20 square meters / 0.8 square meters per minute

Now, let's calculate the time to cover 20 square meters:

Time = 25 minutes.

Therefore, it would take the worker approximately 25 minutes to cover 20 square meters of the floor with lacquer.

Please note that these calculations are based on the assumption that the worker maintains a consistent rate of coverage throughout the entire process.