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An 11-inch by 8-inch piece of cardboard has squares cut out of the corners and is folded up to make an open-top box. If the volume of the box is to be 14 cubic inches, what should be the length of the side of the cut-out corner squares?
A. No solution is possible
B. Either 3.5 inches or approximately 5.8284 inches
C. Either 3.5 inches or approximately 0.1716 inches
D. Exactly 3.5 inches

Respuesta :

  • Volume=14in^3

[tex]\\ \sf{:}\implies (side)^3=14[/tex]

[tex]\\ \sf{:}\implies side=\sqrt[3]{14}[/tex]

[tex]\\ \sf{:}\implies side=2.5in[/tex]

Now

  • L=11in
  • B=8in

[tex]\\ \sf{:}\implies Area=11(8)=88in^2[/tex]

Cut it into 10 parts as per question(Open side means five sides hence it will be 5×2=10)

[tex]\\ \sf{:}\implies 88/10=8.8in[/tex]

Now divide by previous side

[tex]\\ \sf{:}\implies \dfrac{8.8}{2.5}=3.52=3.5[/tex]

Option D