P and Q were assigned to do a work for an amount of 1200 P alone can do it in 15 days while Q can do...........

Quantitative Aptitude ( CCS) Time and work

P and Q were assigned to do a work for an amount of 1200. P alone can do it in 15 days while Q can do it in 12 days. With the help of R they finish the work in 6 days. Find the share if C.

100

120

140

160

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Explanation:

1/15 + 1/12 + 1/c = 1/6, we got C = 60 (it means C will take 60 days to complete the work alone)
so ratio of work done by P:Q:R = 4:5:1
so c share = (1/10)*1200 = 120