At least 17 minutes, simple algorithm: 4+5+6+7+8+9+ 10=49 49/3 rounded to 17.

The arrangement is as follows:

A is shifted by three, 4+5+6= 15.

B moved two, 8+9= 17.

C moved two, 7+ 10= 17.

There are several other arrangements that you can change yourself.