Final answer:
The door on Mai's scale drawing of her kitchen should be 3 centimeters wide because when using the scale factor of 1 to 40, the actual door width of 1.2 meters is represented as 3 centimeters on the drawing.
Step-by-step explanation:
Mai has chosen a scale of 1 to 40 for her kitchen drawing. To find out how wide the door should be on the scale drawing, we need to reduce the actual door width using the same scale factor. Her kitchen door is 1.2 meters wide in reality, so on the scale drawing, the door width would be calculated as follows:
- Actual door width = 1.2 meters.
- Scale factor = 1 to 40.
- Scaled door width = Actual door width / Scale factor.
- Scaled door width = 1.2 meters / 40.
- Scaled door width = 0.03 meters or 3 centimeters.
Therefore, the door should be 3 centimeters wide on the scale drawing because the scale factor of 1 to 40 means that every 1 meter in reality is represented as 2.5 centimeters on the drawing.