issb mathematics MCQ #551

Pipe A fills in 4 h, B empties in 8 h. Net fill time?

issb mathematics MCQ #551

  1. Question 1

    Q1. Pipe A fills in 4 h, B empties in 8 h. Net fill time?

    • A) 6 h
    • B) 7 h
    • C) 8 h
    • D) 10 h

    Answer: 8 h

    Explanation: Net rate 1/4 minus 1/8 equals 1/8 so 8 hours. Apply the same method to similar ISSB quantitative items.