A, B and C together can finish a piece of work in 20 days. A alone can finish the work in 40 days. What part of the work B and C together can finish in a day ?
Answer & explanation
Correct answer: option 4
A + B + C = 20 days,
A = 40 days,
⇒ Therefore, B+C = 1,
⇒ So, part of the work B and C together can finish in a day = \(\frac{efficiency}{total work}\) = \(\frac{1}{40}\) units.