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A thin pole weighing $100\text{ N}$, with uniformly distributed mass, is leaned against a wall at an angle. A triangular "hole" is formed between the pole, wall, and floor, with dimensions as shown in the diagram above.

How much torque is acting on the pole about an axis through its lower corner, caused by the pole's own weight?

A

$20\text{ Nm}$

B

$25\text{ Nm}$

C

$30\text{ Nm}$

D

$40\text{ Nm}$

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