Question

who gives the curved surface of hollow cylinder what theorem behind it.
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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

THE CURVED SURFACE AREA IS CONSIDERED TO BE THE COLLECTION OF PERIMETER OF CIRCLES WITH UNIT THICKNESS

WHEN THEY ARE STACKED MANY NUMBER OF TIMES SAY h TIMES THEN IT GIVES THE C.S.A TO BE

PERIMETER OF EACH CIRCLE × HEIGHT (h)

THEREFORE

C.S.A =

$2\pi {r} \times {h}$

which gives us the formula

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