The density of a material in CGS system of units is 4g/cm3. In a system of units in which unit of length is 10cm and unit of mass is 100g, the value of density of material will be
A
40unit
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B
4unit
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C
0.4unit
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D
0.04unit
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Solution
The correct option is A40unit In CGS system, d=4g/cm3 Since, the unit of mass is 100g and unit of length is 10cm, so density, d=4(100g100)(10cm10)3 ⇒d=(4100)(100g)(110)3(10cm)3 ⇒d=4×103100unit=40unit