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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.

Mathematics
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  • DLS
Did you try it?
I did try it, honestly! but, i'm just not getting the right idea about how to do it! :'(
  • 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?

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Other answers:

Hm.. the no. of workers x time taken by all of them here - 150x
  • DLS
no..i want in variable terms,try gain
nK .. ?
  • DLS
150nK
Eh? :(
  • DLS
gt it?
  • DLS
did you get it?
Noo! Please explain , how did u get it ! i'm sorry to bug you! :P
  • 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?
  • DLS
so form the equation like ques says.. 150nk=150k+146k+142k.....this takes n+8 days
  • DLS
now use the formula for sum of an arithmetic series and tell me
  • DLS
you have n as n+8 u have "a" u have "d" !

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