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The height of the door on the left is reduced to 6 ft.
first door has a length of 7ft and a width 0f 2ft,thickness 2inches.And the second and reduced door has a length 6ft width 2ft and thickness 2inches.
What is the change in surface area between the two versions of the door?
Guest Mar 1, 2012
 #1
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surface area is 2ab+2bc+2ac
after you find the area's for both doors - should be (64) for the 7 foot door and (56) for the 6 foot door. now you find the difference, 64-56=9
9ft difference
Guest Mar 1, 2012
 #2
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well hi,
can u explain abit elaborately????
coz my answers are'nt matching with the options!!!
Guest Mar 1, 2012

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