Discussion
Assertion (A): Loose rice husk is briquetted before being sent any distance.
Reason (R): Its bulk density of about a hundred kilograms a cubic metre fills a lorry long before its weight limit.
Select the correct answer from the options below.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both statements are true and the second explains the first. At about 100 kg/m\(^3\) loose husk fills a lorry's volume long before it approaches the weight limit, so the vehicle carries a fraction of the tonnage it could and the cost per tonne is correspondingly high.
Briquetting raises the density to around 650 kg/m\(^3\), so the same lorry carries several times the mass and the cost per tonne falls in proportion. The calorific value per kilogram is barely altered; the whole gain is in volume.
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