A, B and C can do a work in 12, 15 and 20 days respectively. In how many days, working together they can complete the same work?
Answer & explanation
Correct answer: option 1
A = 12 days, B = 15 days, C = 20 days,
⇒ Time required by A + B + C to complete the work = \(\frac{60}{5+4+3}\) = \(\frac{60}{12}\) = 5 days. ..(\(\frac{Work}{Efficiency}\) = Time)