Latest L&T Aptitude Question SOLUTION: A and B together can complete a work in 15 days. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will compl

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A and B together can complete a work in 15 days. A alone can complete it in 20
days. If B does the work only for half a day daily, then in how many days A and B
together will complete the work?

Asked In L&T Devendra Marghade (5 years ago)

Unsolved Read Solution (2)

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Read Solution (2) :

swathy  (5 years ago)

A+B=15
A=20 then 1/A+1/B=1/15
1/20+1/B=1/15
1/B=1/60
B=60 days if he works only for half a day then he completes total work in 120 days

So, total work completed by A and B ,
1/20+1/120= (120+20)/2400
=140/240
=7/120
So ans is 120/7 days that is A and B can complete whole work in 120/7 days

Is this solution Helpfull? Yes (2) | No   

Vignesh  (5 years ago)

120/7 days

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