Using the Area Formula

by jason zimmerman
(omaha nebraska usa)

Determine the total amount of fertilizer in ounces (oz) needed to fertilize a rectangular lot with dimensions 24 yd by 21 yd if 3 oz of fertilizer is needed per square yard.How would I figure this out?




Karin from Algebra Class Says:

In order to solve this problem, you must first use the area formula to figure out how many square yards you have.

Area = Length x width

A = 24 x 21

A = 714 sq yds

If you have 714 sq yards and it takes 3 oz of fertilizer per square yard, then you must multiply 3 x 714.

3oz x 714 sq yds = 2142 oz of fertilizer.

You would need 2142 oz of fertilizer.

I hope this helps,
Karin

Comments for Using the Area Formula

Average Rating starstarstarstarstar

Click here to add your own comments

Oct 01, 2013
Rating
starstarstarstarstar 		Using the Area Formula
by: Anonymous

The area of a yard is 240 feet by 82 feet. John needs to fertilize his yard . The fertilizer is 0.03 ounce per square foot. How much fertilizer does he need?

__________________________________________________

Karin from Algebra Class Says:



If John's yard is 240 feet by 82 feet, then that means that the length is 240 feet and the width is 82ft.

The Area formula for a rectangle is:
A = length x width or A = lw

First we need to find the area of John's yard.
A = lw
A = 240ft x 82ft
A = 19680 ft^2

John's yard is 19680 ft^2.

If .03 oz fertilizer covers 1 sq foot, then we would need:
.03 x 19680 = 590.4 oz of fertilizer.

John needs 590.4 oz of fertilizer.

Hope this helps,
Karin

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Students.

Need More Help With Your Algebra Studies?

Get access to hundreds of video examples and practice problems with your subscription! 

Click here for more information on our affordable subscription options.

Not ready to subscribe?  Register for our FREE Pre-Algebra Refresher course.