issb mathematics MCQ #679

Pipe A fills in 3 h, B fills in 6 h. Both open, fill time?

issb mathematics MCQ #679

  1. Question 1

    Q1. Pipe A fills in 3 h, B fills in 6 h. Both open, fill time?

    • A) 1.5 h
    • B) 2 h
    • C) 2.5 h
    • D) 3 h

    Answer: 2 h

    Explanation: Combined rate 1/3 plus 1/6 equals 1/2 so 2 hours. Work each step carefully; ISSB math rewards accuracy under time pressure.