atik can finish a job in 100 days. pratik can finish the same job in 120 days. both work for 30 days after that manish joined them. they were able to finish the job in 30 days. in how many days manish can finish the work alone

• never he is destroying the work , i mean negative work
• 10 years agoHelpfull: Yes(0) No(0)
• agree with vivek...as atik n pratik can finish work in 54.5 days...but here they are saying they did work for 30 days n after manish joining they took more 30 days....which simply indicates negative work of manish.
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• sorry here 20 days (matlab tenno ne kaam kiya last k 20 days) in last instead of 30
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• (1/100+1/120)30=11/20
  so remaining 9/20 work done by all of them in 20 days
  i.e 9/20=(1/100+1/120+1/x)20
  solving we get x=240
  c can do work alone in 240days
• 10 years agoHelpfull: Yes(0) No(2)