The grade resistance factor for an earth moving machine can be obtained by multiplying grade
percentage by a factor approximately equal to
(A) 2 kg/tonne
(B) 6 kg/tonne
(C) 9 kg/tonne
(D) 20 kg/tonne
percentage by a factor approximately equal to
(A) 2 kg/tonne
(B) 6 kg/tonne
(C) 9 kg/tonne
(D) 20 kg/tonne