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 alone can complete a work in 5 days more than A B together and B alone can complete a work in 45 d...........

Quantitative Aptitude (SBI-PO) Time and work

A alone can complete a work in 5 days more than A+B together and B alone can complete a work in 45 days more than A+B together. Then in how many days A and B together can complete the work?

16 days

21 days

15 days

20 days

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Explanation:

Shortcut = √5×45 = 15
OR
Let (A+B) can do in x days, so
1/(x+5) + 1/(x+45) = 1/x
Solve, x2 = 225, x = 15

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A alone can complete a work in 5 days more than A B together and B alone can complete a work in 45 d...........

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Explanation:

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