The mass of 1 cm3 of iron is 7.8 g, its density in S.I. unit is : (a) 7.8 kg/cm3 (b) 7.8 g cm-3 (c) 7800 g/cm3 (d) 7800 kg/m3



7800 kg/m3

Reason –

7.8 g/cm3 = 7.8 × 1000

= 7800 kg/m3

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