Pipe A can fill 50% of the tank in 6 hours and pipe B can completely fill the…
2023
Pipe A can fill 50% of the tank in 6 hours and pipe B can completely fill the same tank in 18 hours. If both the pipes are opened at the same time, in how much time (in minutes) will the empty tank be completely filled?
- A.
420
- B.
425
- C.
432
- D.
435
Attempted by 2 students.
Show answer & explanation
Correct answer: C
Pipe A fills the full tank in 12 hours and pipe B in 18 hours. Together their rate is 1/12 + 1/18 = 5/36, so time is 36/5 hours = 432 minutes.