Question

You work as a grounds keeper for a small local elementary school and must fertilize the grass on the entire campus. you know that 4 containers cover 60 square yards. if the campus has 2,000 square yards of grass area, how many containers of fertilizer will you need?

Answer 1

To solve this problem, you would first multiply four and sixty. The sum would equal 240. So 4 containers would cover 240 square yards. Next, you would divide 2,000 by 240. The answer to this division problem would be 8.33333333333. In this situation, you would need to round up to 9 to ensure you had enough fertilizer to cover all the grass on the campus. So, you would need 9 containers.

Answer 2

This is a rule of three problem.
We'll need 4 containers of fertilizer to fertilize 60 square yards:
4 --------> 60
How many containers will we need to fertilize 2000 square yards?
Let x be the number of containers we'll need:
x --------> 2000

Now we can establish a rule of three with those two equation and solve for x to get the number of containers we'll need:
$\frac{4}{x} = \frac{60}{2000}$
$x= \frac{(4)(2000)}{60}$
$x= \frac{(4)(200)}{6}$
$x= \frac{400}{3} =133.33$

We can conclude that we'll need 133.33 containers of grass fertilizer to fertilize the 2000 square yards of grass of the campus.
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