One man can do as much work in one day as a woman can do in 2 days. A child does one-third the work in a day as a man. If an estate owner hires 63 pairs of hands—men, women and children in the ratio 4 : 3 : 2 and pays them in all Rs.23,310 at the end of the day’ s work, what must the daily wages of a child be, if the wages are proportional to the amount of work done ?

Ten people can do a work in $30$ days. In how many days, can 15 people complete double the work - 

1.$40$

2. $25$

3. $20$

4. $45$ 

X can do 5 times faster work than that of Y and so it takes 36 days less than Y. Find the time in which X alone can complete the work?

G is twice as fast as S in doing work. If G can do a work in $30$ days less than S, how many days will they take to complete the work together? 

1.$25$
2. $20$
3. $22$
4.$15$