A is twice as good as a workman B and together they finish a piece of work in 18 days. In how many days will A alone finish the work?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 27 days
“A is twice as good as B” means A does twice as much work as B in a day. Counting the work in units, the total work is what the two together do in 18 days.
A does 2 units a day and B does 1 unit a day, so together 3 units a day
Total work: \(3\times18=54\) units
A alone: \(\displaystyle\frac{54}{2}=27\) days