L = πr²
70.714 = 22/7 × r²
r² = 70.714 ÷ 22/7
r² = 70.714 × 7/22
r² = 1.555.708/22
r² = 70.714
r = √70.714
r = 265,92 meter
d = 2 × r
d = 2 × 265,92
d = 531,84 meter
π × d
3,14 × 531,84
1.669,97 m
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L = πr²
70.714 = 22/7 × r²
r² = 70.714 ÷ 22/7
r² = 70.714 × 7/22
r² = 1.555.708/22
r² = 70.714
r = √70.714
r = 265,92 meter
d = 2 × r
d = 2 × 265,92
d = 531,84 meter
π × d
3,14 × 531,84
1.669,97 m