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Multiple choice

A can complete a piece of work in 18 days. B is 20% more efficient than A. The number of days B takes to complete the same piece of work is ?

  1. 15

  2. 12

  3. 10

  4. 9

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A takes 18 days. B is 20% more efficient, so B's rate is 1.2 times A's rate. Time taken by B = 18 / 1.2 = 15 days.

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