please answer the question.
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Step-by-step explanation:
THE INNER CSA = πdh
= 22/7 x 4 x 77 = 968 cm²
Thickness = 0.2cm
Outer diameter = 4.2cm
Outer CSA = πDH
= 22/7 X 4.2 X 77 = 1061.4
T.SA = 1061.4 + 968 = 2049.4CM²
pandajayeshp78fmp:
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how you have taken by pieDH
2pi r h = pi d h
where does the thickness have gone
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