Q. The density of a material in CGS system of units is 4 g/cm³. In a system of units in which unit of length is 10 cm and unit of mass is 100 g, the value of density of material will be
A) 400
B) 0.04
C) 0.4
D) 40
Explanation
[Solution from source] New unit of density = 100 g/(10 cm)³ = 0.1 g/cm³. So 4 g/cm³ = 4/0.1 = 40 new units. Dividing the wrong way gives 0.4. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.