Decimal expansion of \( \frac{109}{100} \) is:
1 + \( \frac{9}{10} \)
10 + \( \frac{9}{100} \)
1 + \( \frac{0}{10} \)+ \( \frac{9}{100} \)
100 + 9 +\( \frac{0}{100} \)
Amit alone can complete a piece of work in 15 days and Balbir alone can do the same work in 10 days. If Amit alone works for 3 days after which Balbir joins him, then the work will be finished in how many days?
4 \( \frac{4}{5} \) days
\( \frac{1}{6} \) days
\( \frac{4}{5} \) days
7 \( \frac{4}{5} \) days