A $9 \times 20 \mathrm{~cm}$ fluted roller type seed drill is operated at a forward speed of $3 \mathrm{~km} \mathrm{~h}^{-1}$ in a field of size $120 \mathrm{~m} \times 90 \mathrm{~m}$. The effective ground wheel diameter of the seed drill is $0.5 \mathrm{~m}$ and the ratio of ground wheel rpm to the fluted roller rpm is $2 .$ For one complete rotation of each fluted roller, $6.8 \mathrm{~g}$ seed is transferred from the seed box to the seed tube. The average time taken for each turn while operating length-wise is $50 \mathrm{~s}$ and the total time wasted in refilling the seed box for sowing the entire field is 40 min.The seed rate in $\mathrm{kg} \mathrm{ha}^{-1}$ will be

(A) 108.32

(B) 122.55

(C) 136.99

(D) 240.71

A $9 \times 20 \mathrm{~cm}$ fluted roller type seed drill is operated at a forward speed of $3 \mathrm{~km} \mathrm{~h}^{-1}$ in a field of size $120 \mathrm{~m} \times 90 \mathrm{~m}$. The effective ground wheel diameter of the seed drill is $0.5 \mathrm{~m}$ and the ratio of ground wheel rpm to the fluted roller rpm is $2 .$ For one complete rotation of each fluted roller, $6.8 \mathrm{~g}$ seed is transferred from the seed box to the seed tube. The average time taken for each turn while operating length-wise is $50 \mathrm{~s}$ and the total time wasted in refilling the seed box for sowing the entire field is 40 min.The seed rate in $\mathrm{kg} \mathrm{ha}^{-1}$ will be

(A) 108.32

(B) 122.55

(C) 136.99

(D) 240.71

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