efficiency of a is 25% more than b and b takes 25 days to complete a piece of work. a started a work alone and then b joined her 5 days before actual completion of the work. for how many days a worked alone?
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b works for 25 days to complete a piece of work.
Since a is 25% efficient than b, a will take less days by 25% to complete the work.
75/100 × 25 = 18.75 days
b joined 5 days before completion.
18.75 - 5 = 13.75 days
13.75 days that a work alone
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