In the middle of a rectangular area 40 m long and 15 m wide there is a rectangular house with a length and width

In the middle of a rectangular area 40 m long and 15 m wide there is a rectangular house with a length and width of 2.5 m and 3.5 m, respectively .. the farmer decided to sow all the free area with grain, the consumption of which was 300 grams per 1m2. Determine how many kilograms of grain he needs to buy?

Let us first find the total area of ​​the land plot.

To do this, we multiply its dimensions by each other.

40 x 15 = 600 m².

Now we will find the area allocated for the living space.

To do this, we multiply the dimensions of the living space by each other.

2.5 x 3.5 = 8.75 m².

Now we will find the area of ​​land on which the owner decided to plant seeds.

To do this, from the total area of ​​the land plot of 600 m², it is necessary to subtract the area of ​​living quarters of 8.75 m².

600 – 8.75 = 591.25 m².

Now we will find the number of seeds that the owner needs to plant.

To do this, we multiply the found area of ​​land for planting by the number of seeds per 1 m².

591.25 x 300 = 177375 g.

177375 g = 177 kg 375 g.

Answer: The owner needs 177 kg 375 g of seeds for planting.