Figure JKLMN and figure PQRST, shown below, are similar figures.

2 polygons labelled J K L M N and  P Q R S T.
The scale factor of figure JKLMN to figure PQRST is 3:2. If KL = 18 cm and MN = 30 cm, what is the length of side QR?
A.
45 cm
B.
20 cm
C.
27 cm
D.
12 cm