Multiple choice

5 boys can complete a work in 10 days and 8 women can complete the work in 10 days. If all the 5 boys and 8 women work together in how many days will the work get completed?

  1. 8

  2. 10

  3. 5

  4. 6

  5. 9
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

5 boys complete work in 10 days, so 1 boy's 1 day work = 1/(5*10) = 1/50. 8 women complete work in 10 days, so 1 woman's 1 day work = 1/(8*10) = 1/80. Combined work in 1 day = 5/50 + 8/80 = 1/10 + 1/10 = 1/5. Work completes in 5 days.

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