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1. Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many will the tank be filled?
- A. 2
- B. 2
- C. 2
- D. 2
Answer: Option C
Explanation:
Hints: Pipe A, B, and C can fill the tank in 1 hour
( 1/5 + 1/10 + 1/30) portion
= (12 + 6 + 2)/6o portion
= 20/60 portion
= 1/3 portion
All three pipes will fill the tank in 3 hours.
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