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A beaker contains 30 litres of juice. From this beaker 3 litres of juice are taken out and replaced by water. This process was repeated further 2 times. How much juice is now contained by the container?1). 21 litres2). 24.3 litres3). 21.87 litres4). 24 litres |
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Answer» Amount of JUICE LEFT after 3 removals = 30(1 – 3/30)3 = 30 × (9/10)3 = 30 × 9/10 × 9/10 × 9/10 LITRES = 21.87 litres Detailed Solution: Quantity of juice remained after FIRST removal = (30 – 3) litres = 27 litres Quantity of juice remained after second removal = (27 – 27/30 × 3) litre = (27 – 2.7) litres = 24.3 litres Quantity of juice remained after third removal = (24.3 – 24.3/30 × 3) litre = (24.3 – 2.43) litres = 21.87 litres |
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