X-and-Y-can-do-a-work-in-30-days-and-60-days-respectively-If-they-work-on-alternate-days-beginning-with-X-in-how-many-days-will-the-work-be-completed-

Question Number 25295 by Mr eaay last updated on 07/Dec/17

X and Y can do a work in 30 days and

60 days respectively . If they work on

alternate days beginning with X, in

how many days will the work be

completed ?

Answered by mrW1 last updated on 07/Dec/17

\frac{1}{30} + \frac{1}{60} = \frac{1}{20}

i . e . X a n d Y c a n d o \frac{1}{20} o f t h e w o r k i n

o n e d a y . T o c o m p l e t e t h e w o r k e a c h

o f t h e m n e e d s 20 d a y s . i . e . i n 40 d a y s

t h e w o r k w i l l b e c o m p l e t e d .

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