What is the SI unit of length?

Answer and explanation

Correct answer: C. metre (m)

The SI unit of length is the metre (m).
Answer: metre (m).
Why not the others: newton (N): that is the unit of force. ohm: that is the unit of electrical resistance. kelvin (K): that is the unit of temperature (SI).

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What is the SI unit of length? | Junior Cycle (Ireland)