a) 4.3:1
b) 3.3:1
c) 2.3:1
d) 5.3:1
Answer: a
Explanation: Actual speed of tractor (va) = \(\frac{5*5*60}{18}\) = 83.33 m/min
va = rω = r.2πN
N = \(\frac{v}{2πr}=\frac{83.33}{2π*0.6}\) = 22.11
G.r = \(\frac{1000}{3*3.5*22.11}\) = 4.3:1.
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