Q3 of 94 Page 45

Three men A, B and C can complete a job in 8, 12 and 16 days respectively.

A and B work together for 3 days; then B leaves and C joins. In how many days, can A and C finish the work?

A, B and C can complete a job in 8, 12 and 16 days respectively.

1-Day work:


A’s =


B’s =


C’s =


A and B’s 1-day work = + =


A and B work together for 3 days


= 3 × =


The remaining work after 3 days = 1- =


The remaining work will be done by A & C together


Work done by A & C =


By doing potion of the work in a day they can complete remaining work () in 2 days


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