A and b can do a work in 12 days and 16 days respectively.both worked together for 3 days and then a left the work and c joined .both b and c completed the rest of the work in 3 days .in how many days c can compliete the whole work
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12 x 16=192 so 192 divide by 3 is 64 so if it took them 3 days the it took c 12 days
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