P’s 2 days work is equal to Q’s 5 days work. If P and Q together can complete the work in 30 days then how much time Q will take to complete 60% of the work?
Ratio of efficiency of P and Q = 5:2 Let the efficiency of P and Q be 5x and 2x units per day respectively. Total work = 7x × 30 = 210x units Required time = (0.60 × 210x)/2x = 63 days
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