Question

a cylindrical pillar is 28 CM in diameter and 3M height what is its curved surface area

Answer 1

ᴴᴱᵞᴬ!!

ᴳᴵᵛᴱᴺ :-

ᴰᴵᴬᴹᴱᵀᴱᴿ = 28 ᶜᴹ

ᴿᴬᴰᴵᵁˢ = 28/2 = 14 ᶜᴹ

ᴴᴱᴵᴳᴴᵀ = 3 ᴹ = 300 ᶜᴹ (ᴬˢ 1 ᴹ = 100 ᶜᴹ)

ᶜᵁᴿᵛᴱᴰ ˢᵁᴿᶠᴬᶜᴱ ᴬᴿᴱᴬ = 2πᴿᴴ

=> 2 × 22/7 × 14 × 300

=> 26400 ᶜᴹ².

=> 2.64 ᴹ²

ᴴᴼᴾᴱ ᵀᴴᴵˢ ᴴᴱᴸᴾˢ.

Answer 2

Answer:

Given that

Height = 3m

Diameter = 28 cm = 0.28 m

Therefore Radius = 0.14 m

Therefore we know that

Curved surface area = 2 pai r h

= 2 × 22/7 × 0.14 × 3

= 2 × 22 × 0.02 × 3

= 2.64 m²

= 2.64 × 10000 cm²

= 26400 cm²

ANSWER =26400

Step-by-step explanation:

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