What is the maximum number of rectangular blocks
measuring 3 inches by 2 inches by 1 inch that can be
packed into a cube-shaped box whose interior measures
6 inches on an edge?
(A) 24
(B) 28
(C) 30
(D) 36
(E) 40



Answer :

The maximum number of such rectangular blocks that can be packed into the above cube-shaped box is (D) 36.

What is a cuboid?

  • A cuboid is a hexahedron, or six-faced solid, in geometry.
  • It has quadrilateral faces.
  • Cuboid means "like a cube," in the sense that a cuboid can be transformed into a cube by adjusting the length of the edges of the angles between edges and faces.
  • In mathematics, a cuboid is a convex polyhedron with the same polyhedral graph as a cube.

To find t the maximum number of such rectangular blocks that can be packed into the above cube-shaped box:

Given:

  • Dimensions of the Rectangular block are (l, b, h) = (3, 2, 1).
  • Length of an edge of the cube-shaped box = 6.
  • To find the maximum number of such rectangular blocks that can be packed into the above cube-shaped box.
  • Let ′n′ be the maximum number of rectangular blocks.

The volume of ′n′  rectangular blocks = n × l × b × h.

  • = n × 3 × 2 × 1
  • = 6 × n

Volume of the above cube of side (s = 6) = s³ = 6³.

Equating the volume of the above, we get:

  • 6 × n = 6³
  • n = 6²
  • n = 36

Therefore, the maximum number of such rectangular blocks that can be packed into the above cube-shaped box is (D) 36.

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