Final answer:
Without the width of the apartment as measured on the scale drawing, it's impossible to determine the actual width in feet using the provided scale factor of 1 cm:3 ft.
Step-by-step explanation:
The question asks about converting a measurement on a scale drawing to the actual size of an apartment using a scale factor of 1 cm:3 ft. If you have the measurement in centimeters from the drawing, you would multiply it by 3 to get the actual width in feet. However, the width in centimeters is not provided in the question. To answer this question correctly, we would need the width of the apartment as measured on the drawing in centimeters. Without this information, we cannot determine the actual width of the apartment and therefore, cannot select the correct option from A) 21.6 ft, B) 21.0 ft, C) 24.0 ft, D) 25.6 ft.