Answer:
1/96
Explanation:
scale is
a model cannot be as same size as that of actual object ,
hence objects are scales down to some value so that its model can be comfortably made.
scale is generally ratio of length of drawing and actual length of object
scale = length of drawing / actual length of object.
Given
length of classroom drawing = 5in
actual length of classroom = 40 ft
as unit of drawing and actual classroom is different lets make unit of class smilar to that of drawing that is in inches
we know
1 feet = 12 inches
thus 40 feet = 12*40 inches = 480 inches
thus,
actual length of classroom in inches = 480 inches
scale used by Carla = length of drawing / actual length of classroom
= 5 inches/480 inches = 1/96 (answer)