Question
PSLE
Fred wanted to build a set of steps with 4-cm cubes. The figures show how he built the steps from a height of 8 cm to 12 cm to 16 cm. If Fred continued building the steps in this way, what would be the height of the set of steps that had 315 cubes? Express your answer in cm.
2 m

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PSLE
Fred wanted to build a set of steps with 4-cm cubes. The figures show how he built the steps from a height of 8 cm to 12 cm to 16 cm. If Fred continued building the steps in this way, what would be the height of the set of steps that had 315 cubes? Express your answer in cm.