Subject
Bank Exam
Topic
Bangladesh Krishi Bank 2012 (Inspector)
A and B can do a piece of work in 12 days while A alone can do it in 20 days. How long will B alone take to finish the work?
A and B can do a piece of work in 12 days while A alone can do it in 20 days. How long will B alone take to finish the work?
ক)
8daysখ)
30daysগ)
32 daysঘ)
50 daysExplanation
In 12 days, A and B can do 1 job. In 1 day, A and B can do 1/12 job. Again, In 20 days, A can do 1 job In 1 day, A can do 1/20 job Thus, In 1 day, B alone can do (1/12 - 1/20) job = (10-6)/120 job = 4/120 job = 1/30 job Now,Related questions
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