The length of the poster is 2 times its Width, if the perimeter is 72 inches what is the area of poster? explain answer so I can learn?

2015-10-21 12:49 am

回答 (3)

2015-10-21 12:57 am
L=2w
W=w
P=2L+2W
P=2(2w)+2w=72
6w=72
W=12
Since l=2w l=24

A=LxW=12x24=288 sq in.
2015-10-21 1:01 am
2w+w = 36
w = 12
width = 12 in
length = 24 in
Area = 12*24 = 288 in^2
2015-10-21 12:58 am
given L = 2 W , L + W = 72/2 = 36 ---> W = 12 ; thus L = 24 ; A = L W = 288 in²


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