Question

Фермер планировал провести сев за 14 дней.Но ежедневно засевал на 30 га больше,чем планировал,и за 4 дня до срока осталось зпсеять 20 га.Сколько гектаров должно быть засеяно?

Answer 1

Значит, 14х - размеры поля, а (х+30)*10+20=размерам поля=14х

решаем уравнение

10х+300+20=14х

-4х=-320

4х=320

х=80, значит, 80*14=размеры поля=1120 га

Ответ: 1120 га

Удачи :)

Я прошу прощения, опечатался, из-за этого решение пошло наперекосяк. 

Answer 2

х (га.) - за 1 день по плану.

х + 30.

14 * х (га). - должен был посеять по плану.

10 * (х + 30) - посеял за 10 дней.

 

1) 10 * (х + 30) + 20 = 14 * х

10 * х + 300 + 20 = 14 * х

10 * х - 14 * х = -300 - 20

-4 * х = -320

х = 80 (га.) - зас. по плану.

2) 80 + 30 = 110 (га.) - зас. не по плану.

3) 14 * 80 = 1120 (га.) - должен был засеять всего. 

Ответ: должно было быть засеяно 1120 га.

Answer 3

Problem Analysis

A farmer planned to complete sowing in 14 days. However, each day he sowed 30 hectares more than planned. Four days before the deadline, he still had 20 hectares left to sow. We need to determine how many hectares should have been sown in total.

Solution

Let's break down the information given in the problem: - The farmer planned to sow the entire field in 14 days. - Each day, he sowed 30 hectares more than planned. - Four days before the deadline, he still had 20 hectares left to sow.

To find the total number of hectares that should have been sown, we can work backwards from the remaining 20 hectares four days before the deadline.

Since the farmer sowed 30 hectares more than planned each day, we can calculate the total number of extra hectares sown in the four days leading up to the deadline: 30 hectares/day * 4 days = 120 hectares

Now, we subtract the remaining 20 hectares from the total extra hectares sown: 120 hectares - 20 hectares = 100 hectares

Therefore, the total number of hectares that should have been sown is 100 hectares.

Answer

The farmer should have sown a total of 100 hectares.