2012 · Q44
'A' can do a piece of work in 'x' days and 'B' can do the same work in 3x days. To finish the work together they take 12 days. What is 'x' equal to?
Elementary MathematicsArithmetic
- A8
- B10
- C12
- D16
Explanation
1/x + 1/(3x) = 1/12 gives 4/(3x) = 1/12, so x = 16.