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Question : A litre of water weighs a kilogram, and a litre of another liquid weighs 1.340 kilograms. A mixture of the two weighs 1.270 kilograms per litre. The ratio of their volumes in a litre of the mixture is:

Option 1: 27 : 34

Option 2: 7 : 17

Option 3: 17 : 24

Option 4: 7 : 27


Team Careers360 14th Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 7 : 27


Solution : Given: A litre of water weighs a kilogram = 1000 gm
A litre of a 2 nd liquid weighs 1.340 kilograms = 1340 gm
A litre of a mixture of the two weighs 1.270 kilograms = 1270 gm
So, the ratio of their volumes in a litre of the mixture is:
By using alligation
⇒  L1 : L2 = (greater density – mean density) : (mean density – lesser density)
= (1340 – 1270) : (1270 – 1000)
= 70 : 270
= 7 : 27
Hence, the correct answer is 7 : 27.

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