SOLUTION: if 15 men can do a work in 210 days . they started working but at the end 10 days 15 additional men were added then in how many days they all will complete the work

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Question 921645: if 15 men can do a work in 210 days . they started working but at the end 10 days
15 additional men were added then in how many days they all will complete the work
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
The description for doing the 1 job indicates that the one-man work rate is 1%2F%2815%2A210%29 job per day. The added 15 more men mean that the rate simply doubles.

Let t be the additional days that the 30 men work together.

15%281%2F%2815%2A210%29%29%2A10%2B30%281%2F%2815%2A210%29%29t=1

%281%2F210%29%2A10%2B%282%2F210%29t=1

%2810%2B2t%29%2F210=1

10%2B2t=210

2t=200

highlight%28t=100%29
100 additional days for the 15 EXTRA MEN (meaning 30 men total) to FINISH after the first ten days.