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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 50 g, the numerical value of density of the material is :

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The correct Answer is:
40
`p=m/V[p]=[ML^(-3)]`
`128(1kg)(1m)^(-3)=x(50/1000kg)(25/100m)^(-3)rArrx=128xx1000/50xx4^(-3)=(128xx20)/64=40`
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