Amit can do a task in 10 days and Bhanu can do the same task in 40 days. In how many days will the task be completed if they work together ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 8
Working together, they finish in one day the sum of the parts each finishes alone.
Amit’s work in one day: \(\displaystyle\frac{1}{10}\); Bhanu’s: \(\displaystyle\frac{1}{40}\)
Together in one day: \(\displaystyle\frac{1}{10}+\frac{1}{40}=\frac{5}{40}=\frac{1}{8}\)
So the task takes 8 days.