math plzzzzzzz help
posted by kim .
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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