Answer :
The circumference will triple.
C=πd
For d=5cm, this is C=5π.
For d=15cm, this is C=15π.
The second one is 3 times the first one.
C=πd
For d=5cm, this is C=5π.
For d=15cm, this is C=15π.
The second one is 3 times the first one.