Question
Two pipes can alone independently fill a bucket in 10
and 12 minutes. Both are opened together for 3 minutes after which the second pipe is turned off. What is the time taken by the first pipe alone to fill the remaining portion of the bucket?Solution
After 3 minutes, the water fill by (A+B) = 3 × 11 = 33units Remaining water unit = 60 – 33 = 27 units This remaining unit water is filled by A in = 27/6 = 4.5 minutes
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