Multiple choice

Salim can do a piece of work in 20 days whereas his friend Akram can do it little faster & both of them finish it in 7.5 days. In how many days will Akram do it alone?

  1. 10 days

  2. 13 days

  3. 12 days

  4. Data inadequate

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

(Work done by both in one day = 1 ÷ 7.5 = 2/15 Work done by Salim in one day = 1/20. Therefore, work done by Akram in one day = 2/15 - 1/20 = 8 - 3/60 = 5/60 = 1/12. Hence Akram alone can do the work in 12 days.)