issb mathematics MCQ #659

Man rows 9 km/h in still water, stream 4 km/h. Upstream speed?

issb mathematics MCQ #659

  1. Question 1

    Q1. Man rows 9 km/h in still water, stream 4 km/h. Upstream speed?

    • A) 4 km/h
    • B) 5 km/h
    • C) 6 km/h
    • D) 13 km/h

    Answer: 5 km/h

    Explanation: Upstream speed is rowing minus stream so 5 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.