Answer:
28
Step-by-step explanation:
The correct answer is 28
hope this helps
2cm: 6.28
4cm: 12.56
6cm: 18.84
8cm: 25.12
10cm: 31.4
12cm: 37.68
456 / 10 = <u>45.6</u>
So the answer lies between <u>45</u> and <u>46</u>.