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Question

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
0.4 Unit
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B
40 Unit
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C
4400 Unit
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D
0.04 Unit
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Solution

The correct option is B 40 Unit
In CGS, d=4gcm3
If unit of mass is 100 g, 4 g mass in new units is 4100 units

and unit of distance is 10 cm, 1 cm in new units is 110 units

So, density =4(g100)(110cm)3=(4100)(110)3=40 units

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