SABRINAHEARTIN SABRINAHEARTIN Science Answered 15. A biker covers a distance of 150km in five hours. What is the biker's speed? A. 15 kph B. 30 kph C. 45 kphD. 60 kphA. Speed = distance + time B. Speed = work timeC. Speed = force + time D. Speed = time + distance 16. Which of the following does NOT belong to the group? A. aluminum B. copper C. plastic D. iron