and B can do a job together in 25 days after 15 days of working together B leaves if A completes the remaining part of the job in 20 days how long will it take to complete the job working separately

Tyhhj
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question is wrong
 
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wrong question
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see this is the question it is not wrong it is in chapter of time and work in bharti bhawan essential ICSE maths book...

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The question is right
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Hope it helps you;;

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50 days
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What are you looking for?