In a disc clutch, the inside and outside radii of the clutch plate are 50 and $100 \mathrm{~mm}$, respectively. If the axial force exerted on the disc is $4 \mathrm{kN},$ the maximum pressure experienced by the clutch plate in $\mathrm{N} \mathrm{mm}^{-2}$ under uniform wear conditions is

(A) 0.13

(B) 0.17

(C) 0.25

(D) 0.51

In a disc clutch, the inside and outside radii of the clutch plate are 50 and $100 \mathrm{~mm}$, respectively. If the axial force exerted on the disc is $4 \mathrm{kN},$ the maximum pressure experienced by the clutch plate in $\mathrm{N} \mathrm{mm}^{-2}$ under uniform wear conditions is

(A) 0.13

(B) 0.17

(C) 0.25

(D) 0.51

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