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devesh dubey

· started a discussion

· 1 Months ago

work and time (Question: 189939.0 )

why 60*2/12 in place of 60/12?

Question:
A and B can do a work in 12 days, B and C can do in 15 days and C and A can do in 20 days. The time taken by A, B and C to do the same work is –
Options:
A) 5 days
B) 10 days 
C) 15 days 
D) 20 days
Solution:
Ans: (b)


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