Dev and devika can do a piece of work in 45 and 40 days respectively. They began the work together, but dev leaves after some days and devika finished the remaining work in 23 days. After how many days did dev leave?
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( Dev and Devika)'s 1 day's work = 145+140=17360
Work done by Devika in 23 days = 1×2340=2340
Remaining work = 1−2340=1740
Now, 17360
work was done by (Dev and Devika) in 1 day.
1740
work was done by (Dev and Devika) in 1×36017×1740=9 days
Therefore, A left after 9 days.
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