issb mathematics MCQ #389

Upstream speed 8 km/h, stream 2 km/h. Boat speed still water?

issb mathematics MCQ #389

  1. Question 1

    Q1. Upstream speed 8 km/h, stream 2 km/h. Boat speed still water?

    • A) 6 km/h
    • B) 8 km/h
    • C) 10 km/h
    • D) 12 km/h

    Answer: 10 km/h

    Explanation: Still water speed equals upstream plus stream so 10 km/h. Work each step carefully; ISSB math rewards accuracy under time pressure.