Multiple choice

P and Q together can complete a work in 15 days. P is 50% more efficient than Q. How long will P take to complete the work alone?

  1. 20

  2. 24

  3. 25

  4. 30
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

P is 50% more efficient than Q, so if Q's rate is 2 units/day, P's rate is 3 units/day. Combined rate = 5 units/day. Together they finish in 15 days, so total work = 75 units. P alone at 3 units/day takes 75/3 = 25 days. Option C is correct.

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