The density of material in SI unit is 128kg m-3. In certain units in which the unit of length is 25 cm and the unit of mass is 50g, the numerical value of density of the material is:
Your option is incorrect !!
A. 40
B. 16
C. 640
D. 410
Physical quantity, n u =constant -
now,
50g equal to 1 unit of mass
so 1g equal to unit of mass
Similarly 25cm equal to 1 unit of length
so 1cm equal to unit of length
so
so put in equation no.(1)
so ans is 40
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