# X is twice as good a workman as Y and together they finish a piece of work in 18 days. In how many days will X alone finish the work?

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X=2y

X+Y=18

2Y+Y=18

3Y=18

Y=6

=>X=2×6

=>X=12

therefore x will finish the work in 12 days Hope it helps u

A=2:1

a+b in a day=1/18

b in a day=1/8 * 1/3

=1/54

so b=54days

a+b in a day=1/18

b in a day=1/8 * 1/3

=1/54

so b=54days