Question
Sam has 20 cubes of edge 4 cm. He uses all the cubes to make a cuboid that has a square base as shown.
  1. What is the height of the cuboid?
  2. If he wants to build a big cube of side 28 cm, how many more 4-cm cubes will he need?
4 m
(a)

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(b)

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Sam has 20 cubes of edge 4 cm. He uses all the cubes to make a cuboid that has a square base as shown.
  1. What is the height of the cuboid?
  2. If he wants to build a big cube of side 28 cm, how many more 4-cm cubes will he need?