James has a 6-ft board that is 24 in. wide. He wants to cut it into five pieces to make a small bookshelf with two shelves. The front and back will not be covered. What should be the dimensions of the bookshelf to maximize the volume and use all of the 6-ft board?

Respuesta :

Answer:

width: 12in length: 18in

Step-by-step explanation:

x: width y: length

(using diagram)(in ft)

3x+2y=6 y>x

y=1.5 x=1

1ft=12 in 1.5 ft =18in

hope this helps, will be confusing without diagram!

The dimensions of the bookshelf to maximize the volume and use all of the 6-ft board are w = 18 inches and l = 12 inches.

Given

James has a 6-ft board that is 24 in. wide.

He wants to cut it into five pieces to make a small bookshelf with two shelves.

The front and back will not be covered.

Let the length of the bookshelf be l and the width of the bookshelf be w.

[tex]\rm 3l + 2w = 6[/tex]

When the value of l = 1.5.

[tex]\rm 3l + 2w = 6\\\\3(1)+2w=6\\\\3+2w=6\\\\2w=6-3\\\\2w=3\\\\w =\dfrac{3}{2}\\\\w=1.5[/tex]

Convert into inches

[tex]\rm 1 \ feet =12 \ inches\\\\1.5 \ feet= 18 \ inches[/tex]

Hence, the dimensions of the bookshelf to maximize the volume and use all of the 6-ft board are w = 18 inches and l = 12 inches.

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