For a cylindrical shell (subject to the thickness of uppermost course...

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For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell

A. Decreases upwards

B. Increases upwards

C. Remains same throughout

D. May decrease or increase upwards depending upon whether vacuum or positive pressure would be maintained inside the shell

Answer: Option A

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