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A cylinder has a radius r. To what height h should it be filled with water so that the thrust on its walls is equal to that on its bottom

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a
h = 2r
b
h = r
c
h = (r/2)
d
h = (r/4)

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detailed solution

Correct option is B

ρghπr2=∫0h (2πrdh)ρgh ρghπr2=2πrρgh22 r=2h2 r=h


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