The Linear Density of a Rod,in G/m,is Given By $\lambda = 40.0 + 30.0 x$

Multiple Choice

The linear density of a rod,in g/m,is given by $\lambda = 40.0 + 30.0 x$ .The rod extends from the origin to x = 0.400 m.What is the location of the center of mass of the rod?

A) x = 0.213 m
B) x = 0.315 m
C) x = 0.384 m
D) x = 0.184 m
E) x = 0.208 m