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Two pipes J and K can separately fill a pot in 2 hours and 3 hours respectively. If both the pipes are open simultaneously in the empty pot, then what time pot will take to filled?1. 1 hours 12 minutes2. 2 hours 30 minutes3. 1 hour 15 minutes4. 1 hours 20 minutes |
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Answer» Correct Answer - Option 1 : 1 hours 12 minutes Given: Two pipes J and K can separately fill a pot in 2 hours and 3 hours respectively. Concept: If a tap can fill a tank in x hours, then the tank filled by the tap in 1 hour = 1/x of the total tank. Calculation: Part of the pot filled by pipes J and K in 1 hours = (1/2) + (1/3) = (3 + 2)/6 = 5/6 parts Required time = (6/5) hours = 1 hours \(\frac{1}{5} \times 60\) = 1 hour 12 minutes ∴ The pot will take 1 hour 12 minutes to filled. |
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