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

lsquo A rsquo is thrice as good a workman as lsquo B rsquo and takes 10 days less to do a piece of ...........

Quantitative Aptitude (CDS) Time and work

‘A’ is thrice as good a workman as ‘B’ and takes 10 days less to do a piece of work than ‘B’ takes. The number of days taken by ‘B’ alone to finish the work is

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Explanation:

Let A takes days to finish work = x
Let B takes days to finish work = x + 10
As A is thrice more efficient, hence B will take 3 times the time taken by A.
x + 10 = 3x
Solving, we get: x = 5
Time taken by B = x + 10 = 15 days

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