Multiple Choice Questions

A can do a piece of work in 30 days He works at it for 5 days and then B finishes it in 20 days In w...........

Quantitative Aptitude (RRB NTPC) Time and work

A can do a piece of work in 30 days. He works at it for 5 days and then B finishes it in 20 days. In what time can A and B together it?

40/3

51/2

97/5

67/2

5/30 + 20/x = 1
x = 24
1/30 + 1/24 = 3/40
40/3 = 13 1/3 days

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