A rectangular piece of metal is 15 in longer than it is wide Squares with sides 3 in long are cut from the four comers and the flaps are folded upward to form an box If the volume of the box is 1488i * n ^ 3 what were the original dimensions of the piece of metal?

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

answer;

the correct answer

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the 3rd on is correct

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