Question
PSLE
Oscar wanted to build a set of steps with 5-cm cubes. The figures show how he built the steps from a height of 10 cm to 15 cm to 20 cm. If Oscar continued building the steps in this way, what would be the height of the set of steps that had 312 cubes? Express your answer in cm.
2 m

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PSLE
Oscar wanted to build a set of steps with 5-cm cubes. The figures show how he built the steps from a height of 10 cm to 15 cm to 20 cm. If Oscar continued building the steps in this way, what would be the height of the set of steps that had 312 cubes? Express your answer in cm.