In a single pass rolling process using 410 mm diameter steel

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In a single pass rolling process using 410 mm diameter steel rollers, a strip of width 140 mm and thickness 8 mm undergoes 10% reduction of thickness. The angle of bite in radians is

1. 0.006
2. 0.031
3. 0.062
4. 0.600

Correct Option: C

cosθ = 1 −	Δh
	2R

h_i = 8 mm
h_f = 8 × 0.9 = 7.2 mm

cosθ = 1 −		8 − 7.2
		2 × 205

D = 410
R = 205
θ = 0.0624 radians