Aptitude Question: Answer:

First: A is twice as good workman as B:

A=2B----1

Second data: together they finish work in 18 days

A+B=18 days-----2

Third question: How many days A alone finish the work?

A, B they together work there one day work is =1/18

A+B=1/18

Submit equation 1 into 2

3B=1/18

B=1/(18*3)

B=1/54

A=1/18-1/54

A=(3-1)/54=2/54=1/27

Finally A alone he finish the work in 27 days. Source from R.S Aggarwal Book