P can finish a work in 27 days Q in 9 days and C in 12 days Q amp R start the work but are forced to...........

Quantitative Aptitude ( CCS) Time and work

P can finish a work in 27 days, Q in 9 days and C in 12 days. Q & R start the work but are forced to leave after 4 days. The remaining work done by P in:

6 days

9 days

10 days

12 days

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Explanation:

Answer
6 days
Explanation :
(Q+R)’s one day’s work = 1/9+1/12 = 7/36
Q & R in 3 days = 4*7/36 = 7/9
Remaining work = 1-(7/9) = 2/9
1/27 work is done by A in 1 day.
2/9 work is done by A in 27*2/9 = 6 days

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