A man can complete a work in 20 days, and a woman can complete the same work in 10 days. If they work on it together for 5 days, then how many days will the woman take to complete the rest of the work?
Answer & explanation
Correct answer: option 1
Man = 20 days,
Women = 10 days,
⇒ M + W worked for 5 days = (1 + 2) x 5 = 15 units ..(Efficiency × Days = Total work)
⇒ Remaining units = 20 - 15 = 5 units.
⇒ Time taken by woman to complete the 5 units = \(\frac{5}{2}\) = \( { 2}_{ 2}^{ 1} \) days. ..(\(\frac{Work}{Efficiency}\) = Time)