Quantitative Aptitude
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Work and Time
Question
20 out of 25
X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?
A  6 days 
B  10 days 
C  15 days 
D  20 days 
E  None of These

Ans. B X →20
Y →12
Let total work be 60
So, x → 3 unit
Y → 5 unit
In 4 day X can do 3 x 4 = 12 unit
So they complete work in = 6 days
So work complete in 6 + 4 = 10 days
Work and Time Flashcard List
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