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The density of a material in SI units is...

The density of a material in SI units is `128 kg m^(-3)` In certain units in which the unit of length is 25 cm and the unit of mass is 100 g, the numerical value of density of the material is_____.

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`rho = m/V [rho] = [ ML^(-3) ]`
` 128 (1kg) (1m)^(-3) = x ( 100/1000 kg ) (25/100m)^(-3) rArr x = 128 xx 1000/100 xx 4^(-3) = (128 xx 10)/(64) = 20`
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