Multiple choice

Rahul can do a piece of work in 15 days and Rishabh can do the same work in 10 days. If they work on it together for 5 days, then what fraction of work is left?

  1. 1/6

  2. 2/3

  3. 3/4

  4. 3/5

  5. 4/7

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

Work done by Rahul in 5 days is 5/15. Work done by Rishabh in 5 days is 5/10. Total fraction of work done by Rahul and Rishabh together in 5 days = 5/10 + 5/15 Fraction of work left = 1 - (5/15 + 5/10) = 1/6