A tractor operated single acting trailing type disc harrow has 8 discs on each gang. The gang angle of both the gangs is maintained at $35^{\circ} .$ The horizontal component of resultant soil reaction force on each disc is $600 \mathrm{~N}$ and it makes an angle of $30^{\circ}$ with the gang axis. If the speed of operation is $6 \mathrm{~km} \mathrm{~h}^{-1}$, the required drawbar power in $\mathrm{kW}$ to operate the harrow will be________________

A tractor operated single acting trailing type disc harrow has 8 discs on each gang. The gang angle of both the gangs is maintained at $35^{\circ} .$ The horizontal component of resultant soil reaction force on each disc is $600 \mathrm{~N}$ and it makes an angle of $30^{\circ}$ with the gang axis. If the speed of operation is $6 \mathrm{~km} \mathrm{~h}^{-1}$, the required drawbar power in $\mathrm{kW}$ to operate the harrow will be________________

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