help256 help256

05-07-2016
Mathematics

contestada

Can someone please answer. There is only one question. There's a picture too. Thank you!

Can someone please answer There is only one question Theres a picture too Thank you class=

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professorlopes001 professorlopes001

05-07-2016

I supposed π ≈ 3.14 and we have A = 490.87 km²:

Area(A) is: A = π × r² or 3.14 × r² = 490.87 →

r² = 490.87/3.14 → r² = 156,32 → r = √156,32 → r = 12.5

But diameter (d) is: d = 2 × r → d = 2 × 12.5 →d = 50 km

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