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Mathematics 7 Online
OpenStudy (anonymous):

a room has a perimeter of 48 feet. The width is 2/3 of the length. What is the dimensions of the room

OpenStudy (anonymous):

okay lets do this together. what is the perimeter of a room, if its length is L and width is W?

OpenStudy (anonymous):

p=48

OpenStudy (anonymous):

no no, I am asking you the formula for perimeter of a rectangle whose length is L and width is W.

OpenStudy (anonymous):

p=2l+2w

OpenStudy (anonymous):

okay great!. so 48 = 2L+2W

OpenStudy (anonymous):

now, the problem states that width is 2/3rds as long as the length.

OpenStudy (anonymous):

so what is the relationship between L and W?

OpenStudy (anonymous):

the width is 2/3 of the length

OpenStudy (anonymous):

right, so can you express that in mathematical terms?

OpenStudy (anonymous):

48=2l + 2(2/3)l

OpenStudy (anonymous):

great! solve for L and then get W = 2/3L

OpenStudy (anonymous):

how i dont understand

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