18.10. (USCS units) A 4-in-thick aluminum slab is 10 in wide and 100 in long. It is reduced in one pass in a two-high rolling mill to a thickness -

3.5 in. The roll rotates at a speed - 12 rev/min and has a radius - 20in. The aluminum has a strength coefficient 25,000 lb/in' and a strain hardening exponent- 0.20 (Table3.4), Determine (a) roll force, (b) roll torque, and (e) power required to accomplish this operation.