Q. A can do a work in 30 days. B is twice as efficient as A. In how many days can B complete the work?

  • (A) 10 days
  • (B) 12 days
  • (C) 15 days
  • (D) 18 days
✅ Correct Answer: (C) 15 days
Explanation: If efficiency doubles, time becomes half. Therefore B takes 15 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:20 am in Math

Explanation by: Deepak Sahoo
If efficiency doubles, time becomes half. Therefore B takes 15 days.

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