according to instruction on a bag of fertilizer 5lb cover 100 sq ft. how many sq ft 25 lbs will cover? use proportion or ratiov
2007-01-31 16:56:11 · 5 answers · asked by wornne g 1 in Science & Mathematics ➔ Mathematics
A proportion is a relation between two things, in this case pounds of fertilizer to square feet covered, and is usually represented by fractions. Thus, from the information
5/100 = 25/x
where x is the square feet covered by the 25 pounds. These two relations are equal. You can use the rule "product of the means equals the product of the extremes" to get
5x = 2500 -> x=500
Thus, 25 pounds of fertilizer will cover 500 square feet.
2007-01-31 17:09:48 · answer #1 · answered by Dan 3 · 0⤊ 0⤋
If one pound takes up 250 sq ft. And you want to find... how many pounds of fertilizer is in 3500sq ft. You will divide the 250 sq ft. ( which equals a pound ) into the 3500 sq ft. ( which will come out to be like 14 pounds of fertilizer (use a calculator) i didnt... So im pretty sure you will need 14 pounds of fertilizer 1 pound equalling 250 sq ft. to fertilize 3500 square feet ... hope i worked it out enough for you...
2016-05-24 00:56:58 · answer #2 · answered by Megan 4 · 0⤊ 0⤋
Since 5 lb covers 100 sft, 25 lb will cover 500 sft. 5:100 :: 25:X solve for X. X is 500
2007-01-31 17:28:19 · answer #3 · answered by Swamy 7 · 0⤊ 0⤋
500
2007-01-31 17:09:37 · answer #4 · answered by klone17 1 · 0⤊ 0⤋
5lb=100sqft
25lb=x
=25*100=5x
2500=5x
500sqft
2007-02-01 03:12:29 · answer #5 · answered by tuti 1 · 0⤊ 0⤋