Discussion
Milled rice sells at \( 480 \) per tonne and brokens at \( 260 \). Raising head rice yield from \( 55 \) to \( 62 \) per cent of a tonne of paddy adds
Answer: B
Correct answer: 15.4 currency units
The seven percentage points move from brokens to head rice, and each tonne gains the price difference on that fraction:
\[ \Delta = 0.07 \times (480 - 260) = 0.07 \times 220 = 15.4 \]
The calculation shows why head rice yield dominates a rice mill's economics. Total output is unchanged - the same rice leaves the mill - but its composition has shifted towards the premium grade, and on tens of thousands of tonnes a year that difference is what separates a profitable mill from a marginal one.
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