Question

Два трактора вспахали поле за 6ч. работая по отдельности , первый трактор вспахал бы это поле за 15 за сколько часов вспахал бы поле второй трактор

Answer 1

1/(1/15+1/x)=6
1/x+1/15=1/6
1/x=1/6-1/15
1/x=5/30-2/30
1/x=3/30
1/x=0,1
x=1/0,1
x=10 часов

Answer 2

Calculating the Time Taken for the Second Tractor to Plow the Field

To calculate the time taken for the second tractor to plow the field, we can use the concept of work done. If two tractors plowed the field in 6 hours working separately, and the first tractor would have plowed the field in 15 hours working alone, we can calculate the time it would take for the second tractor to plow the field alone.

Let's denote the time taken by the second tractor to plow the field alone as x hours.

Using the concept of work done, the equation can be set up as follows:

1/15 + 1/x = 1/6

Solving for x: ``` 1/15 + 1/x = 1/6 1/x = 1/6 - 1/15 1/x = 5/30 - 2/30 1/x = 3/30 x = 30/3 x = 10 ``` So, the second tractor would plow the field in 10 hours if it worked alone