Answer:
the dimensions of the drawing scale are
60 units by 20 units
Explanation:
Given:
A game room has a floor that is 75 feet by 20 feet
A scale drawing of the floor on grid paper uses a scale of 4 units:5 feet
The length of the drawing scale is
Let actual Length 
 feet.
 feet.
actual width 
 feet.
 feet.
Drawing 

Put the actual length in above equation.
Drawing 

Drawing 

Drawing 
 
 
The drawing length is 60 units.
For drawing width
Drawing 

Put the actual width in above equation.
Drawing 

Drawing 

Drawing 
 
 
The drawing width is 16 units.
Therefore, the dimensions of the drawing scale are
 60 units by 16 units