A tractor operated single acting trailing type disc harrow has 8 discs on each

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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 350. The horizontal component of resultant soil reaction force on each disc is 600 N and it makes an angle of 300 with the gang axis. If the speed of operation is 6 km h-1, the required drawbar power in kW to operate the harrow will be _______________

Options:

A . 12.3 to 12.5

B . 14.4 to 14.6

C . 24.4 to 24.6

D . 14.2 to 14.4

Answer: Option B

-NA-

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