Multiple choice general knowledge math & puzzles

Anup can do a piece of work in 10 days and Jagdeesh can do the same work in 15 days. In how many days the work will be completed if both works together.

  1. 5

  2. 6

  3. 7

  4. 8

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

Anup's rate = 1/10 work per day, Jagdeesh's rate = 1/15. Combined rate = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6. Time = 1/(1/6) = 6 days. This uses the standard work-rate formula.