S=πr^2
π=3.14
r^2=153.86/3.14
r^2=49
r=7
d=r*2
d=14
Ответ: 14 м.
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S=πr^2
π=3.14
r^2=153.86/3.14
r^2=49
r=7
d=r*2
d=14
Ответ: 14 м.