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Vlad (the vampire) wanted to line the inside of his cof􏰀in bed with purple cloth. He measured the inside height, length and width to be twenty-three inches, eighty-four inches and twenty- eight inches. He also noted that it was a rectangular prism. The purple cloth is sold by the foot in sixty inch wide pieces. How many feet of cloth does he need to buy?

 Jul 7, 2022
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Surface area of prism  =

 

2 [ 23* 84 + 84*28 + 28*23  ] =    9856 in^2

 

No. of inches of cloth necessary =  ceiling [ 9856/60  ]  ≈  165 in

 

No. of feet  of cloth  =   165  /12   ≈  13.75 ft

 

 

cool cool cool

 Jul 7, 2022

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