Question

( )7850cm2
B
( )7850mm2
C
( )31400mm2
D
()7850mm3
E
7850mm
​

Answer 1

Resposta:B (X)7850mm2

Explicação passo-a-passo:

PI=3,14,d=100 mm,r=?,A=?

r=d/2              A=Pi,r^2

r=100/2          A=3,14.50^2

r=50 mm        A=3,14.2500

                       A=7850 mm^2