Question

You are applying fertilizer to a football field. The field is 360 feet long and 160 feet wide. You use 8 pounds of fertilizer per 1,000 square feet. The fertilizer comes in 50-pound bags. How many bags of fertilizer will you need to complete the job?

Answer 1

Answer: 10 bags

Explanation:

First we must calculate the field area. Assuming it is a rectangle then its area equals the product of its length times its width

`A =360*160\\\\A = 57600 ft^2`

You use 8 pounds of fertilizer per 1,000 square feet

So the amount of fertilizer you should use is:

`57,600 ft^2 * (8\ pounds)/(1,000\ ft^2) = 460.8\ pounds`

As the fertilizer comes in bags of 50 pound then you need

`460.8\ pounds * (1\ bag)/(50\ pounds) = 9.2\ bags`

Since you can not buy 9.2 bags then we round up to the next whole number.

Finally you need 10 bags of fertilizer