Two shafts of equal length and similar material in which one is hollow and the other is solid are transmitting the same level of torque. If the inside diameter is \( \frac{2}{3}\) of the outside diameter of the hollow shaft, the ratio of the weight of hollow shaft to the weight of the solid shaft is

Two shafts of equal length and similar material in which one is hollow

1.	Two shafts of equal length and similar material in which one is hollow and the other is solid are transmitting the same level of torque. If the inside diameter is \( \frac{2}{3}\) of the outside diameter of the hollow shaft, the ratio of the weight of hollow shaft to the weight of the solid shaft is
A.	0.642
B.	0.358
C.	0.732
D.	1.444
Answer» B. 0.358