10. 'A' and 'B' can dig a canal in 30 days. They worked for 10 days and then 'B' left. It took 20
more days to complete the work by 'A'. How long will 'A' take to dig the canal on his own?
(a) 27 days (b) 30 days (c)33 days (d) 37 days
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Step-by-step explanation:
answr is a bcse after ten days both will work then work is for 20 day more eschan work done is 15and one left so answe a
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