Question
A and B individually can complete the work in 28 days
and 42 days respectively. If the time taken by C alone to complete the work is 1.25 times the time taken by A and B together to complete the work, find the time taken by C to complete the work while working alone.Solution
Time taken by A and B together to complete the work = (28 × 42)/ (28 + 42) = 16.8 days Time taken by C alone to complete the work = 1.25 × 16.8 = 21 days
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