Question

The farmer needs to buy fertilizer to spread on his garden. The garden is a 20 x 15 rectangle. A bag of fertilizer covers 30 ft.² of garden. How many bags of fertilizer will be needed?

Answer 1

10 bags of fertilizer.

Explanation:

300 area

300 / 30 = 10 bags

Answer 2

`10`

Explanation:

The area of a rectangle is given by
`A=lw`, where
`l` is the length of the rectangle and
`w` is the width of the rectangle. Therefore, the area of a 20 x 15 rectangle is equal to
`20\cdot 15=300\:\mathrm{ft^2}`.

Since one bag of fertilizer covers 30 square feet, the farmer needs
`\left \lceil (300)/(30)\right \rceil=\boxed{10}` bags of fertilizer.