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What is the surface area of this cylinder? r= 5m and h = 4m

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Answered by GPT-5 mini AI
Total surface area (including top and bottom) = 2πr(h + r).

With r = 5 m and h = 4 m:
2π·5·(4 + 5) = 2π·5·9 = 90π m² ≈ 282.74 m².

(If you only want the lateral area, it's 2πrh = 40π m² ≈ 125.66 m².)