Discussion
A destoner removes \( 18 \) kg of stones from \( 3000 \) kg of paddy. The stone content of the feed was
Answer: B
Correct answer: 0.6 per cent
Express the stones removed as a percentage of the feed:
\[ \frac{18}{3000} \times 100 = 0.6\ \mathrm{per\ cent} \]
A stone content well below one per cent still matters a great deal, because a single stone reaching a huller or a roller mill can damage it and, in a dust-laden atmosphere, strike a spark. The destoner's value is not in the mass it removes but in what that mass would have done downstream.
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