Question
The ratio of time taken by P, Q and R to complete work
alone is 6:7:3 respectively. If all three together complete the work in 7 days, then find in how many days P alone will complete two-third of the same work?Solution
Ratio of efficiency of P, Q & R = 7 : 6 : 14 So, let total work = (7x + 6x + 14x) × 7 = 189x unit Required days = 189x × 2/3 × 1/7x = 18 days
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