RRB Technician (Grade I Signal + Grade III) 2026 · Question 89 of 265

Three inlet pipes A, B, and C can fill a tank in 8 hours, 12 hours, and 24 hours, respectively. First, pipe A is opened alone for 1 hour. Then pipe B is opened, and both A and B run together for the next 2 hours. After that, pipe C is also opened, and all three pipes run together until the tank is full. How much total time, from the start, will it take to fill the tank?

1. A4 hour 30 minutes
2. B4 hour 40 minutes
3. C4 hour 20 minutes
4. D4 hour 50 minutesCorrect