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Q.

The density of a material in SI units is $128 k g . m^{- 3}$ . In certain units in which the unit of length is 50 cm and the unit of mass is 50 g, the numerical value of the density of the material is

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a

410

b

640

c

320

d

40

answer is B.

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Detailed Solution

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$\frac{128 \times 1000 g}{100 \times 100 \times 100 c m^{3}} = \frac{N_{2} \times 50 g}{50 \times 50 \times 50 c m^{3}}$

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