Multiple choice

A can do a piece of work in 4 days, B in 12 days and C in 6 days. If A is assisted by both B and C on every third day, the total work can be done in how many days? A एक काम को 4 दिन में, B, 12 दिन में और C, 6 दिन में कर सकता है । यदि B और C द्वारा A की सहायता हर तीसरे दिन की जाए तो वह काम कितने दिन में पूरा हो जाएगा?

  1. 6 days/दिन

  2. 3 days/दिन

  3. 5 days/दिन

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

A's rate = 1/4 per day, B's = 1/12, C's = 1/6. Pattern: Days 1-2: only A works (2 × 1/4 = 1/2). Day 3: A+B+C together (1/4 + 1/12 + 1/6 = 1/2). Every 3 days, 1 complete unit of work is done. Total work finishes in exactly 3 days.

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