Question

2 тракториста вспахали участок за 3 ч. Если бы первый тракторист работал один, то он выполнил бы эту работу за 5 ч.Какую часть работы выполнил второй тракторист за 3 ч?

Answer 1

Если первый тракторист выполнил бы работу за 5 часов, значит в час он выполняет по 1/5 части всей работы. За 3 часа он выполнит 1/5 * 3 = 3/5. Второму остается 2/5 работы на три часа. Получается в один час он делает 2/5 : 3 = 2/15 
Ответ: 2/15

Answer 2

Calculating the Work Done by the Second Tractorist

To calculate the work done by the second tractorist in 3 hours, we can use the information provided in the question and the given context.

Given: - Two tractorists plow a plot in 3 hours. - If the first tractorist worked alone, it would take 5 hours to complete the work.

We can use the concept of "work done" to find the proportion of work done by the second tractorist in 3 hours.

Work Done by the First Tractorist in 1 Hour: - If the first tractorist worked alone, it would take 5 hours to complete the work. - Therefore, the work done by the first tractorist in 1 hour is 1/5 of the total work.

Work Done by the Second Tractorist in 3 Hours: - Since both tractorists together completed the work in 3 hours, we can calculate the work done by the second tractorist in 3 hours.

Calculating the Proportion of Work Done by the Second Tractorist: - The work done by the second tractorist can be calculated as the difference between the total work and the work done by the first tractorist.

Using the Formula: - Work done by the second tractorist = Total work - Work done by the first tractorist

Calculation: - Work done by the second tractorist = 1 - (1/5) = 4/5

Therefore, the second tractorist completed 4/5 of the work in 3 hours.