alleryHow should a mass of 7 kilograms be correctly written?
A7kgs
B7 kgs
C7 kg
D7 kg.
Answer & Solution
Correct answer: C. 7 kg
1. Symbols for units have no plural 's' and no full stop in the middle of a sentence.
2. A space is left between the number and the unit.
3. So 7 kg is correct, while 7 kgs, 7kgs and 7 kg. are not.
_Source: NCERT Curiosity Class 6 Science, Ch 6, Do you know? on units_
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