A is thrice as good a workman as B and takes 10 days less to do a piece of work than B takes. The number of days taken by B to finish the work is :
A. 12
B. 15
C. 20
D. 30
Answer: Option B
Solution (By Examveda Team)
A must be able to finish the same job in one-third of the time taken by B. So let's say if A takes X days to complete the work, B will do it in 3X daysSince A finishes the job in 10 days less,
we have : 3X - X = 10
So, X = 5
A finishes the work in 5 days and B in 15 days
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