Mrs. Green had a rectangular gardeb that was 4 yards wide and had a area od 28 square yards. If she wanted to put a fence completely around her garden, how much fence would she need?
2007-03-28 13:26:16 · 7 answers · asked by amandablake3194 2 in Science & Mathematics ➔ Mathematics
If it was 4 yards wide and had an area of 28 square yards, since width*length = 28, it must have been 7 yards long. That means the distance around the entire thing is 2(length) + 2(width), or 2*4 + 2*7 = 22 yards.
2007-03-28 13:31:15 · answer #1 · answered by dac2chari 3 · 0⤊ 0⤋
She would need 22 linear feet of fence.
If the area (L*W=A) is 28 and the width is 4. Then divide 28 by 4. THe answer is 7. Since it is a rectangle, two sides are 7 and the other two are 4, so add all four side to determine the amount of fence, or the perimeter.
7+7+4+4=22
2007-03-28 20:31:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The area is 7 yards length by 4 yards wide = 28 sq. yards.
7 + 4 + 7 + 4 = 22 or the perimeter; she would need 22 yards of fence.
2007-03-28 20:30:24 · answer #3 · answered by Dan 2 · 0⤊ 0⤋
What you need to find is the length. Substitute the numbers you already have into the formula for the area of a rectangle. A = bh.....28 = 4L......divide by 4 and the length is 7yd. Now, you can find the perimeter by adding up all the sides. 7 + 7 + 4 + 4 = 22yd.
2007-03-28 21:21:34 · answer #4 · answered by dpirsq2 5 · 0⤊ 0⤋
The area of a rectangle is length x width:
You know the width is 4 yards and need to find the length.
a = length x width
28 sq. yd = length x 4 yd (now, divide both sides by 4 yd)
7 yd = length
To find out how much fence is needed, you
just need to find the perimeter of the rectangle.
Perimeter = 2(length + width)
= 2 (7yd + 4yd)
= 22yd
2007-03-28 20:31:12 · answer #5 · answered by VJ 2 · 0⤊ 0⤋
Permiter is 2(l+w)
Area is l*w
So we have lw=28
and w = 4
lw=28
l(4)=28
l=7
2(l+w)=p
2(7+4)=p
2(11)=p
22 = permiter, so she will need 22 yards of fence
2007-03-28 20:30:33 · answer #6 · answered by danjlil_43515 4 · 0⤊ 0⤋
just multiply 28x4
2007-03-28 20:34:54 · answer #7 · answered by mary + Alex 1 · 0⤊ 1⤋