A band brake is used to operate on a 600 mm diameter drum that is rotating at 200 rpm. The coefficient of friction is 0.

[answerhappygod]

A band brake is used to operate on a 600 mm diameter drum that
is rotating at 200 rpm. The coefficient of friction is 0.25. The
brake band has an angle of contact of 270o and one end is fastened
to a fixed pin while the other end is fastened on the brake arm 120
mm from the fixed pin. The straight brake arm is 760 mm long and is
placed perpendicular to the diameter bisecting the angle of
contact. The brake arm to stop the drum if34 KW is absorbed. What
width of steel band, 2.4 mm thick, is required for this brake if
the maximum tensile stress is not to exceed 55 MPa? a. 59.2
mm b.52.4 mm c.
64.2 mm d .46.3 mm