Answer:
Circumference of the well = 3.93 ft
Step-by-step explanation:
Emma is making a scale drawing of her farm using the scale 1 cm = 2.5 ft
She drew a well with a diameter of 0.5 cm.
We have to calculate the actual circumference of the well.
Since the scale factor used by Emma was 1 cm = 2.5 ft
So by this scale actual diameter of well will be
0.5 cm = 
Now radius of the well will be 

Since circumference of a circle P = 2πr
Therefore P = 2×(3.14)×(0.625) = 3.93 ft
Answer is " circumference of the well is 3.93 ft "