C= about 150.72 ft
A= about 1808.64 ft squared
How I did it:
Considering that every 5cm is equal to 12 feet, and the diameter in cm is 20, I divided 20 by 5 to find the amount of 12-foot sections in the drawing. 20/5=4, so I multiplied 12 by 4 to find the diameter in feet, which was 48. This means that 48 ft=d. I then used the formulas for circumference ([tex]\pi[/tex]*d) and area ([tex]\pi r^{2}[/tex]) using the diameter of 48 to get C and A.
Hope I helped :)
