Motor Oil, with a Viscosity Of $0.25 \mathrm {~N} \cdot \mathrm { s } / \mathrm { m } ^ { 2 }$

Multiple Choice

Motor oil, with a viscosity of $0.25 \mathrm {~N} \cdot \mathrm { s } / \mathrm { m } ^ { 2 }$ is flowing through a tube that has a radius of 3.0 mm and is 1.0 m long. The drop in pressure over the length of the tube is 200 kPa. What is the average speed of the oil?

A) 1.2 m/s
B) 0.90 m/s
C) 0.80 m/s
D) 1.1 m/s
E) 1.0 m/s