# If 9 boy working 15/2 hrs a day finish a work in 20 days, then how many days will be taken by 12 boy working 6 hrs a day

+1 vote
1,258 views

If 9 boy working 15/2 hours a day can finish a work in 20 days, then how many days will be taken by 12 boy working 6 hours a day to finish the work, it being given than 3 boy of latter type work as much as 2 boy of he former type in the same.

posted Dec 2, 2015

28.125 days.
Total Boy hours required= 9*15/2*20 = 1350
Later type boys available of former type = (12/3)*2 = 8
Days required= 1350/(8*6) = 28.125 days

answer Dec 10, 2015 by anonymous

Similar Puzzles
+1 vote

If A men working A hours a day can do A units of a work in A days, then how many units of work can be completed by B men working B hours per day.

Nine men can finish a work in 20 days whereas 12 women can finish the same work in 18 days.
If 6 men and 9 women started working together.
After 8 days 3 women left and 2 new men joined the work, the group continued working together till the end of the work.
In how many days they would be able to do the remaining work?