Need most appropriate comparison of the spreads.

The interquartile range is given by:
Third quartile-First quartile
Thus
IQR of Town A:
First quartile=20
Third Quartile=40
hence
IQR=40-20=20°

IQR of Town B
First Quartile=20
Third Quartile=30
Hence
IQR=30-20=10

From the above calculations we conclude that the answer is:
A] The interquartile range (IQR) for town A, 20°,is greater than the IQR for Town B, 10

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's