A can finish a piece of work in 12 days, while B can do it in 15 days. If both work together, what time will they take to do the work ?
Answer & explanation
Correct answer: option 3
Time taken by both of them to work together = \(\frac{ 60 }{ 9 }\)
= \(\frac{ 20 }{ 3 }\)
The correct answer is option (3) : $\frac{20}{3}days$