The border of the rectangular section is 2 km. The length of the section is 4 times greater than the width.

The border of the rectangular section is 2 km. The length of the section is 4 times greater than the width. For sowing this area, 1 centner of 20 kg of grain per hectare was prepared. How many seeds do you need to sow a plot?

First, we determine the sum of the length and width of this section.

Divide its border by 2.

We get:

2/2 = 1 km.

We translate the resulting value into meters.

1 km = 1000 m.

Since the length and width of the section are 4: 1, then its width will be:

1000 / (4 + 1) = 1000/5 = 200 meters.

The length will be equal to:

4 * 200 = 800 meters.

We find the area of the site.

200 * 800 = 160,000 m2

We translate the found area into hectares.

160,000 / 10,000 = 16 hectares.

So for sowing you will need:

16 * 1 q 20 kg = 16 * 120 kg = 1920 kg.

Answer: 1920 kg of grain.