Multiple choice

Anshu, Swati and Rajni can finish a work in 4 days if they work together. However, Anshu alone will take 9 days to complete the work, and Swati alone will complete the work in 12 days. How many days will Rajni alone take to complete the work?

  1. 18

  2. 12

  3. 24

  4. 16
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In 1 day, Anshu completes 1/9 of the work, Swati completes 1/12, and together with Rajni they complete 1/4. Therefore, Rajni's daily work rate is 1/4 - 1/9 - 1/12 = 1/18, which means she alone would take 18 days to complete the work.

Keep practicing — related questions