If a segment of wire has a net charge (uniformly distributed), and then its length is increased by 50%,by what factor has its charge density changed?

If the original charge was 10.0 nC, how much charge must then be added to restore the wire’s original charge
density?

2 answers

3/2 the length
same charge
so 2/3 the density

(3/2) * 10 = 30/2 = 15
so increase by 5 nC
How is it 3/2 the length?