Respuesta :

Answer:

L=πD

D=L/π

D=31.4см/3.14=10см

Step-by-step explanation:

Answer:

754.9[tex]\pi[/tex]

Step-by-step explanation:

31÷2=15.5

3.142×15.5²=754.8655

rounded 754.9[tex]\pi[/tex]