A cylinder of `150 mm` radius rotates concentrically inside a fixed cylinder of `155 mm` radius.
Channel: Doubtnut
Date: 2020-01-26

A cylinder of `150 mm` radius rotates concentrically inside a fixed cylinder of `155 mm` radius. Both culinders are `300 mm` long. Determine the viscosity of the liquid which fills the space between the cylinders if a torque of `0.98 n-m` is required to maintain an angular velocity of `60 r.p.m.`