Question
PSLE
Sam wanted to build a set of steps with 3-cm cubes. The figures show how he built the steps from a height of 6 cm to 9 cm to 12 cm. If Sam continued building the steps in this way, what would be the height of the set of steps that had 63 cubes? Express your answer in cm.
2 m

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PSLE
Sam wanted to build a set of steps with 3-cm cubes. The figures show how he built the steps from a height of 6 cm to 9 cm to 12 cm. If Sam continued building the steps in this way, what would be the height of the set of steps that had 63 cubes? Express your answer in cm.