Answer:
Concentric circles share a common center (the same center).
Answer: I think what you have to do is divide 50 km ÷ 1.5 = 33.33 km/h.
Explanation: 1.5 is 1 hour and 30 minutes so you just divide the speed by the hours you have. Hope it helps :)
The answer is A you wouldn't know the answer because you have not read the story