Question
P’s 5 days work is equal to Q’s 7 days work. If P
and Q together can complete the work in 20 days then how much time Q will take to complete 75% of the work?Solution
Ratio of efficiency of P and Q = 7:5 Let the efficiency of P and Q be 7x and 5x units per day respectively. Total work = 12x × 20 = 240x units Required time = (0.75 × 240x)/5x = 36 days
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