Multiple choice

A can do a work in 4 days. B completes the same work in 8 days. C takes as long as A and B would take if they worked together. How long will it take B and C to complete the work if they work together?

  1. 3 days

  2. 12/5 days

  3. 32/3 days

  4. 8/3 days

  5. 2 days
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

(A + B) can do the work in (4 * 8) / (4 + 8) = 32/12 = 8/3 days

Therefore, C takes 8/3 days to complete the work. So, (B + C) takes ((8/3) * 8)/((8/3) + 8) = 64/32 = 2 days. It is the correct answer.

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