A two-wheel drive tractor weighing $18 \mathrm{kN}$ has a wheel base $1.8 \mathrm{~m}$. Its centre of gravity is located $600 \mathrm{~mm}$ ahead of the rear axle centre, under static condition, on a level ground. When this tractor is used to pull a disc plough hitched at a height of $390 \mathrm{~mm}$ from the ground, the draft observed is $6 \mathrm{kN}$. The change in reaction on rear wheels of the tractor due to pull in $\mathrm{kN}$ is

(A) 1.30

(B) 1.95

(C) 3.90

(D) 5.85

A two-wheel drive tractor weighing $18 \mathrm{kN}$ has a wheel base $1.8 \mathrm{~m}$. Its centre of gravity is located $600 \mathrm{~mm}$ ahead of the rear axle centre, under static condition, on a level ground. When this tractor is used to pull a disc plough hitched at a height of $390 \mathrm{~mm}$ from the ground, the draft observed is $6 \mathrm{kN}$. The change in reaction on rear wheels of the tractor due to pull in $\mathrm{kN}$ is

(A) 1.30

(B) 1.95

(C) 3.90

(D) 5.85

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