Multiple choice

Charlie can do a piece of work in 20 days, working 5 hours a day, whereas Biz can do the same work in 20 days, working 4 hours a day. If Charlie, Biz and Tony worked together and completed the work in 10 days, working 4 hours a day, how many days did Tony alone require to complete the same work, working 8 hours a day?

  1. 20 days

  2. 25 days

  3. 30 days

  4. 50 days
Reveal answer Fill a bubble to check yourself
D Correct answer

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