Sun	Mon	Tue	Wed	Thu	Fri	Sat
23	24	25	26	27	28	1
2	3	4	5	6	7	8
9	10	11	12	13	14	15
16	17	18	19	20	21	22
23	24	25	26	27	28	29
30	31	1	2	3	4	5

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Multiple Choice Questions

A and B can do a piece of work in 72 days B and C can do it in 120 days C and A can do it in 90 days...........

Quantitative Aptitude (IB) Time and work

A and B can do a piece of work in 72 days. B and C can do it in 120 days. C and A can do it in 90 days. In how many days all three together can do the work?

80 days

120 days

100 days

60 days

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Explanation:

Solution:
(total work=360)
A+B= 72————-5
B+C=120————3
C+A=90————–4
=>2(A+B+C)=12
A+B+C=6
total days=360/6=60 days

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A and B can do a piece of work in 72 days B and C can do it in 120 days C and A can do it in 90 days...........

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