A takes 5 days and B takes 9 days more than C

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And if this question comes in exam..Either one will leave it or consume whole a4 sheet...Kindly provide some trick ..Otherwise every question can be solved by conventional methods

forever-fzhk
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why we take one day's work for calculation ?...
why we can't use whole work (A+B=C)?....
Explain sir

GaneshKumar-hwcw