Define one kilogram, the SI unit of mass. How is it related to (i) quintal (ii) metric tonne and (iii) gram?
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Solution
One kilogram is defined as the mass of 1 litre (= 1000 ml) of water at 4 degrees Celsius.
(i) 1 quintal = 100 kg
(ii) 1 metric tonne = 10 quintal = 1000 kg
(iii) 1 kg = 1000 g