Q. A can complete a work in 63 days and B in 21 days. Their combined one-day work is:

  • (A) 1/14
  • (B) 2/63
  • (C) 4/63
  • (D) 5/63
✅ Correct Answer: (C) 4/63
Explanation: Combined rate = 1/63 + 1/21 = 4/63.

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

Explanation by: Deepak Sahoo
Combined rate = 1/63 + 1/21 = 4/63.

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