Answer : Explanation : Given A,B,C can complete a work in 15,20 and 30 respectively.The total work is given by the LCM of 15, 20, 30 i.e, 60.A

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A,B,C can complete a work in 15,20 and 30 respectively.They all work together for two days then A leave the work,B and C work some days and B leaves 2 days before completion of that work.how many days required to complete the whole work?