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Start learning 50% faster. Sign in nowLet total capacity of the tank is 210 litres (LCM of 42 and 30) Quantity of water filled by tap ‘A’ in one hour = 210/42 = 5 litres Quantity of water filled by tap ‘B’ in one hour = 210/30 = 7 litres Let tap ‘A’ is closed after ‘x’ hours So, 12 × x + 7 × (20 – x) = 210 Or, 5x = 70 Or, x = 14 hours
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Where is Duncan passage located?
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