Question
Meena can paint a house in 24 days. If Meena and Reena
together can complete it in 15 days, then how many days will Reena take to finish the work on her own?Solution
ATQ,
Let the total work be 120 units {LCM (24 and 15)}
Efficiency of Meena = (120 / 24) = 5 units/day
Efficiency of Meena and Reena together = (120 / 15) = 8 units/day
Efficiency of Reena = 8 - 5 = 3 units/day
Time required by Reena to complete the work alone = (120 / 3) = 40 days
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