A team can do a particular task in 10 days. Another team can do the same task in 20 days. How many days will the job be finished, if both the teams work together?
Answer: (c) 20/3 days.
A team can do a particular task = 10 days
another team can do the same task = 20 days
Bothe teams work together = 10 x 20/10 + 20
= 20/3 days