Question
P and Q individually can complete the work in 26 days
and 39 days respectively. If the time taken by R alone to complete the work is 1.25 times the time taken by P and Q together to complete the work, find the time taken by R to complete the work while working alone.Solution
Time taken by P and Q together to complete the work = (26 × 39)/ (26 + 39) = 15.6 days Time taken by R alone to complete the work = 1.25 × 15.6 = 19.5 days
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