Multiple choice

A, B and C together can do a work in 3 days. If A or B alone can do the work in 8 days, then how long will C take alone to do the same work? A, B और C एक साथ एक काम को 3 दिनों में कर सकते है। यदि A या B अकेले 8 दिनों में काम कर सकते है तो C अकेले इसी काम को कितने समय में करेगा?

  1. 6 days/दिन

  2. 7 days/दिन

  3. 12 days/दिन

  4. 18 days/दिन
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The combined work rate of A, B, and C is 1/3 work per day. Since A and B each complete the work in 8 days (rate 1/8 per day), C's rate = 1/3 - 1/8 - 1/8 = 1/12 per day. Thus C alone takes 12 days.

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