Question

Cho mình hỏi đáp án là gì :

Answer 1

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Answer 2

Step by step solution:

Let x be the radius of circle B

Then x/3 is the radius of circle A

We have: Circumference of circle B: 2π⋅x
Circumference of circle A: 2π⋅x/3
The time that circle A will revolve in total: (2π⋅x)/(2π⋅x/3)=3 (times)

=> B is the correct