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Answer:
(1)8.4 g cm^-3 , (ii)8400 kg m^-3
Explanation:
density in g cm^-3
density = mass /volume
= 252/ 30 = 8.4 g cm^-3
(ii) density in km m^-3
= .252/.00003= 25200/3
= 8400 kg m^-3
[Note : 1cm^3 =1 × 1/100 × 1/100 × 1/100
= 0.000001 m^3
so 30 cm^3 = 30× 1/100 × 1/100 × 1/100
= 3/100000 = 0.00003 m^3 ]
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