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? - Study24x7
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Goraksha Dadhich
01 Jan 1970 05:30 AM study24x7 study24x7

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

Banking Railways UPSC Sciences
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