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jeyben [28]
3 years ago
11

Hi :), im really struggling with this. Just wanted to know if anyone can explain step by step for me please. Id really appreciat

e it.

Mathematics
1 answer:
Dvinal [7]3 years ago
7 0

Answer:

314 m²

Step-by-step explanation:

the formula for the surface area of a sphere (As) is

As = 4×pi×r²

the radius r (half of the diameter) is clearly indicated as 5m.

so, As = 4×3.14×5² = 4×3.14×25

I don't even need a calculator for this, as 4×25 = 100

so, As = 100×3.14 = 314

(you know, when multiplying by 10, the decimal point moves right one position. multiply by 100 it moves 2 positions, and so on).

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