Multiple choice general knowledge math & puzzles

If 'A' can complete a work in 12 days and 'B' is 60% efficient than that of 'A',then in how many days 'B' can do the same work?

  1. 7

  2. 7.5

  3. 8

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

If A takes 12 days, then B's efficiency being 60% more means B works at 1.6x A's rate. So B takes 12/1.6 = 7.5 days. The phrase '60% efficient than that of A' is slightly awkward but mathematically leads to option B.

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