A cube has a side length of 1/3 inch.

It would take __ blocks with a side length of 1/6 inch to fill the cube. It would take __ blocks with a side length of 1/9 inch to fill the cube.

Answer the blanks above.

Respuesta :

You have the volume of the cube is:

 Vcube=a^3
 Vcube=(1/3 inch)^3
 Vcube=1/27 inch^3

 The volume of a block with a side length of 1/6 inch is:

 V1=1/216 inch^3

 (1/27 inch^3)/(1/216 inch^3)=8 blocks with a side length of 1/6 inch

 The volume of a block with a side length of 1/9 inch is:

 V2=1/729 inch^3

 (1/27 inch^3)/(1/729 inch^3)=27 blocks with a side length of 1/9 inch

Answer:

8 blocks and 27 blocks.

Step-by-step explanation:

A cube has a side length of [tex]\frac{1}{3}[/tex] inch.

(A) Let B block with a side length of [tex](\frac{1}{6})[/tex] inch will be required to fill the cube.

so volume of cube = volume of block B

[tex](\frac{1}{3})^3[/tex] = B × [tex](\frac{1}{6})^3[/tex]

B = [tex]\frac{(\frac{1}{3})^3}{(\frac{1}{6})^3}[/tex]

  = [tex]\frac{(6)^3}{3^3}[/tex]

  = [tex](\frac{6}{3})^3[/tex]

  = (2)³ = 8 blocks

(B) Let C blocks with a side length of [tex](\frac{1}{9})[/tex] inch will be required to fill the cube.

Volume of cube = total volume of blocks C

[tex](\frac{1}{3})^3[/tex] = [tex](\frac{1}{9})^3[/tex] × C

C = [tex](\frac{1}{3})^3[/tex] / [tex](\frac{1}{9})^3[/tex]

  = [tex]\frac{9^3}{3^3}=(\frac{9}{3})^3=3^3[/tex]

  = 27 blocks

Therefore, answer is 8 blocks and 27 blocks.