## aaddiittii 3 years ago 150 workers were engaged to finish a job in a certain number of days. 4 workers dropped out on second day, 4 more workers dropped out on third day and so on. It took 8 more days to finish the work. Find the number of days in which the work was completed.

1. DLS

Did you try it?

I did try it, honestly! but, i'm just not getting the right idea about how to do it! :'(

3. DLS

Okay, Let work was to be finished in n days and a labour works K hours per day/one day. Then what is the numerical value or required human hours for the work to be done?

Hm.. the no. of workers x time taken by all of them here - 150x

5. DLS

no..i want in variable terms,try gain

nK .. ?

7. DLS

150nK

Eh? :(

9. DLS

gt it?

10. DLS

did you get it?

Noo! Please explain , how did u get it ! i'm sorry to bug you! :P

12. DLS

1person works n days k hours 150 persons work 150nK :o unitary method,which grade are u in ? :p

Haha, LOL! I feel s stupid right now! I didn't see that "n days k hrs" thing properly! :P Anyways, that portion is clear now :P Next?

14. DLS

so form the equation like ques says.. 150nk=150k+146k+142k.....this takes n+8 days

15. DLS

now use the formula for sum of an arithmetic series and tell me

16. DLS

you have n as n+8 u have "a" u have "d" !