Solved UPSC CDS/OTA Question
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Q · Mixture and AlligationMedium · 45s
A vessel contains 80 liters of a mixture of acid and water in the ratio 7:1. How much water must be added to make the ratio 3:1?
TopicMixture and Alligation
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Apply mixture and allegation concepts to solve the problem.
Final Answer: Option B — 8 liters