Question
If Neha can complete a work in 40 days by working 5 hours a
day, how many hours per day should she work to complete the same work in 25 days?Solution
ATQ,
Let the efficiency of Neha be 'x' units per hour
Therefore, total work = 5 Ă 40 Ă x = 200x units
Let the time she should work to complete the work in 25 days be 'y' hours a day.
ATQ;
200x = 25 Ă y Ă x
Or, y = 8
Therefore, she should work for 8 hours a day.
Alternate solution:
Required time = (5 à 40) á 25 = 8 hours
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