Answer:
1 : 120
Explanation:
Given that ;
Actual width = 30feets
Width in drawing = 3 inches
Recall :
1 foot = 12 inches
Actual width in inches : (30 * 12) = 360 inches
Comparing actual width to drawing width
3 inches : 360 inches
1 : 120
Scale used is :
1 : 120