This question belongs to scaling of the diagram.
Peter is an artist who drams models of scaling real life objects.
It is given that Peter's modelling scale is
9inches:5 feet
It means that 9 inches of any drawing of Peter is 5 feet on the real model
Thus 1 feet of the real world is 9/5 inches of drawing
It is given to us that a table in the restaurant is 10 feet
Thus,
the length of table in drawing = 9/5*10=18 inches
Thus, the length of table drawing is 18 inches
Disclaimer:
The ratio sign in model scaling is not provided and has been assumed
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