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September 16, 2014

Homework Help: math plzzzzzzz help

Posted by kim on Thursday, July 7, 2011 at 8:43pm.

this is grade 10 math questions
a rectangular window is 5 feet 3 inches in length, and 3 feet 6 inches in width. if the perimeter of the window must have caulking that costs 32cents per inch, how much will the caulking cost??
the answer is $67.20
but i got 846.73 :(
what i did was

5ft=60inch legth= 60 + 3 = 63inches
and for the width
3ft=36inches width= 36 +6 = 42inches

42 x 63 =2646

2646 x 0.32= 846.72
plzz tell me what i did wrong

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