A four wheel truck 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 four wheel truck or whose operating weight is 12000 kg is pulled alo

1.	A four wheel truck 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
Answer» D. 50 kg/tonne