An inclined blade cutting tool of $250 \mathrm{~mm}$ width is operating at $200 \mathrm{~mm}$ cutting depth. The normal load on the tool and the coefficient of soil-metal friction are $1000 \mathrm{~N}$ and 0.3 , respectively. The soil cutting force per unit length of cutting edge is $20 \mathrm{~N} \mathrm{~mm}^{-1}$. The tool lift angle is $40^{\circ} .$ The required specific draft (or unit draft) in $\mathrm{kPa}$ is___________

An inclined blade cutting tool of $250 \mathrm{~mm}$ width is operating at $200 \mathrm{~mm}$ cutting depth. The normal load on the tool and the coefficient of soil-metal friction are $1000 \mathrm{~N}$ and 0.3 , respectively. The soil cutting force per unit length of cutting edge is $20 \mathrm{~N} \mathrm{~mm}^{-1}$. The tool lift angle is $40^{\circ} .$ The required specific draft (or unit draft) in $\mathrm{kPa}$ is___________

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