Question
If ‘P’ can complete a task in 24 days and ‘P’
with ‘Q’ together can finish it in 15 days, then how many days will ‘Q’ take to complete the work alone?Solution
Let the total work = 120 units {LCM (24 and 15)} Efficiency of ‘P’ = (120/24) = 5 units/day Efficiency of ‘P’ and ‘Q’ together = (120/15) = 8 units/day Efficiency of ‘Q’ = (8 – 5) = 3 units/day Time taken by ‘Q’ to finish the work alone = (120/3) = 40 days
Defines the number of entities in one entity set, which can be associated with the number of entities of other set via relationship set.
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