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Please help with part A, I’re tried the question but I’m not sure if it’s correct

Please help with part A, I’re tried the question but I’m not sure if it’s correct-example-1

2 Answers

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V = Ab·h/2

= π·r²·h/2

r = d/2 = 3m/2 = 1,5m

= π·(1,5m)²·3m/2

= π·2,25m²·1,5m

= 3,375π m³

= 10, 5975 m³

π = 3,14

User Teo
by
7.4k points
1 vote

Answer:

tsa of semi-cylinder is 21.21m²

Explanation:

tsa of cylinder = 2πr² + 2πrh

radius = diameter ÷2

= 1.5m

tsa = (2×π×1.5²) + (2×π×1.5×3)

= 4.5π + 9π

= 13.5π

≈ 42.412m²(3d.p) (cylinder)

semi = 42.41 ÷ 2

≈ 21.21m² (2d.p)

(Correct me if i am wrong)

User Henry Keiter
by
8.0k points
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