1.

rpm of a trommel at critical speed is given by (where, D = Diameter of trommel in ft)

A. <img src="/_files/images/chemical-engineering/mechanical-operations/123-387-1.png">
B. <img src="/_files/images/chemical-engineering/mechanical-operations/123-387-2.png">
C. <img src="/_files/images/chemical-engineering/mechanical-operations/123-387-3.png">
D. 76.75
E. <span class="root"><i>D</i></span>
Answer» C. <img src="/_files/images/chemical-engineering/mechanical-operations/123-387-3.png">


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