three pipes a A,B&D can fill an empty tank in 3 hours, 12 hours and 6 hours , respectively. in how much time will they can be filled in all three pipeswotk together?
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Step-by-step explanation:
In half an hour B+C must have filled
=42+32=72units
Capacity left
=36−72=652 units
Now, all pipes will fill the remaining tank
=652×(6+4+3)=652×13=52
=212hrs
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