Question

'M' can complete a work in 45 days. 'N' is 20% less efficient than 'M'. 'M' and 'N' work together for 15 days, after which 'N' leaves. 'P' joins 'M' and they finish the remaining work in 6 days. Find the time taken by 'P' alone to complete the entire work?

A 20 days
B (45/2) days
C 25 days
D (55/2) days
E 30 days
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