Multiple Choice Questions

A is thrice as a good a workman as B and therefore is able to finish a job in 60 days less than B Wo...........

Quantitative Aptitude (IB) Time and work

A is thrice as a good a workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do the job in:

60 days

22 ½ days

45/4 days

30 days

atio of times taken by A and B = 1 : 3.

The time difference is (3 - 1) 2 days while B take 3 days and A takes 1 day.

If difference of time is 2 days, B takes 3 days.

If difference of time is 60 days, B takes		3	x 60		= 90 days.
		2

So, A takes 30 days to do the work.

A's 1 day's work =	1
	30

B's 1 day's work =	1
	90

(A + B)'s 1 day's work =		1	+	1		=	4	=	2
		30		90			90		45

A and B together can do the work in	45	= 22	1	days.
	2		2

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