Multiple choice

A is 3/4 times as good a workman as B and therefore, he is able to finish a job in 45 days less than B. if they work together, then how many days will they take to finish the work?

  1. 40 days

  2. 78 days

  3. 45 days

  4. 48 days

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

(A + B)'s 1 day's work = (1/135 + 1/180) = 7/540  Days taken by A and B to complete the work = 540/7 = 77.14 = 78 days