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Which option uses the correct unit?

Answer and explanation

Correct answer: The pencil is ten centimetres long

Centimetres are suitable units for measuring the length of a pencil, so option C is correct. Litres and millilitres measure volume, while grams measure mass; none of these can measure length. Exam tip: identify the physical quantity first, then select its appropriate unit.

Related tags

Units And MeasurementLengthCentimetrePhysical QuantitiesClass 9 ScienceMeasurement And Scientific UnitsExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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