Alright, lets get started.
The particular rocket lenght is = 16 ft
We need to built a model of that keeping scale given 1 in = 2 ft
Means each 2 ft, we need to consider height of model is 1 in.
Which means, for 16 ft, we need to make model of = 16 / 2 = 8 inches
So the model is 8 inches tall. : Answer
Hope it will help :)