Question

[Nguyễn Thùy Dương]

giải đi nhé

Answer 1

[lam232143]

địt ko em

Answer 2

[Nguyễn Văn Phú]

Solution:

B. 3B. 3

Step by step solution:

Let xx be the radius of circle B

Then x3x3 is the radius of circle A

We have:

Circumference of circle B: 2π⋅x2π⋅x

Circumference of circle A: 2π⋅x32π⋅x3

The time that circle A will revolve in total:

2π⋅x2π⋅x3=32π⋅x2π⋅x3=3 (times)