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25 Jul 2010, 07:29
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Niranjan,rajesh and vinayak can complete a piece of work in 10,15,12 days.All the three of them started working and after a certain number of days(y).Niranjan stopped working and rajesh stopped working exactly(y) days before the work got completed.In how many integral number of days did the work get completed?
25 Jul 2010, 10:47
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Hi,
3 of them working together finish the job in 4 days (1/T = 1/10+1/15+1/12). Their rate is 1/4.
Rajesh and Vinayak working together finish the job in 20/3 days (1/T = 1/15+1/12). Their rate is 3/20.
Vinayak working alone finish the job in 12 days (1/T = 1/15+1/12). His rate is 1/12.
We can say:
y*1/4 + x*3/20 + y*1/12 = 1.
We still need to know x to solve the problem. Or, I am missing something
regards,
Jack
3 of them working together finish the job in 4 days (1/T = 1/10+1/15+1/12). Their rate is 1/4.
Rajesh and Vinayak working together finish the job in 20/3 days (1/T = 1/15+1/12). Their rate is 3/20.
Vinayak working alone finish the job in 12 days (1/T = 1/15+1/12). His rate is 1/12.
We can say:
y*1/4 + x*3/20 + y*1/12 = 1.
We still need to know x to solve the problem. Or, I am missing something
regards,
Jack
mohater
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25 Jul 2010, 20:37
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Locked due to missing info and posting in the wrong forum.
