A Solid Cylinder Has a Radius of 0

Multiple Choice

A solid cylinder has a radius of 0.051 m and a height of 0.0030 m. The cylinder is composed of two different materials with mass densities of 1950 kg/m³ and 1470 kg/m³. The cylinder contains an equal mass m of each of the two materials, so that the total mass is M = 2m. What is the mass m?

A) 8.4 × 10^-2 kg
B) 2.1 × 10^-2 kg
C) 1.4 × 10^-2 kg
D) 6.5 × 10^-2 kg
E) 4.2 × 10^-2 kg