issb mathematics MCQ #810

Pipe A fills in 4 h, B fills in 8 h. Both open, fill time?

issb mathematics MCQ #810

  1. Question 1

    Q1. Pipe A fills in 4 h, B fills in 8 h. Both open, fill time?

    • A) 2 h
    • B) 2.5 h
    • C) 3 h
    • D) 3.5 h

    Answer: 2 h

    Explanation: Combined rate 1/4 plus 1/8 equals 3/8 so about 2.67 hours. Work each step carefully; ISSB math rewards accuracy under time pressure.