A four wheel trac*or whose operating weight is 12000 kg is pulled along a road having a rising slope of 2% at a uniform speed.


Assume grade resistance factor = 10 kg/tonne. The tension in the tow cable is 720 kg. The rolling resistance of the road will be___________________?

A. 20 kg/tonne

B. 30 kg/tonne

C. 40 kg/tonne

D. 50 kg/tonne

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