Question
Priya, Riya, and Supriya can complete a piece of work
individually in (20/3) days, 20 days, and 25 days, respectively. If they work together, how many days will it take for them to complete 84% of the work? ÂSolution
Let total amount of work = 100 units (LCM of 20/3, 20 and 25) Efficiency of Priya = 100/(20/3) = 15 units per day Efficiency of Riya = 100/20 = 5 units per day Efficiency of Supriya = 100/25 = 4 units per day Amounts of work to be completed = 0.84 × 100 = 84 units Desired time = 84/(15 + 5 + 4) = 3.5 days
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