Question

‘A’ is twice as good a workman as ‘B’ and together they finish a work in 18 days. In how many days ‘A’ alone will finish the work ?
1. 31 days
2. 25 days
3. 27 days
4. 29 days

Answer 1

Correct Answer - Option 3 : 27 days

Given 

A and B can finish the work = 18 days 

Formula Used 

Work = time × Efficiency 

Calculation 

Efficiency of A : B = 2 : 1 

Total work = (A + B) × 18 = 3 × 18 = 54 

So, A can do work alone in days = 54/2 = 27 days 

∴ The work is to be done by A alone in 27 days