The drum of a mixer is accelerated uniformly from rest by a driving torque of 12 Nm and rotates through 50 revolutions in the first 30 s. The acceleration continues for a further 20 s to reach the...

The drum of a mixer is accelerated uniformly from rest by a driving torque of 12 Nm and rotates through 50 revolutions in the first 30 s. The acceleration continues for a further 20 s to reach the steady operating speed of the mixer. Determine

the fi nal speed attained