1.

1). 18 litres2). 24 litres3). 32 litres4). 40 litres

Answer»

LET the QUANTITY of the wine in the CASK originally be x litres

Then, quantity of wine left in cask after 4 OPERATIONS = {x (1 – 8/x)?} litres

⇒ {X (1 – 8/x)?}/x = 16/81

⇒ (1 – 8/x)? = (2/3)?

⇒ (X – 8)/x = 2/3

⇒ 3x – 24 = 2x

∴ x = 24 litres



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