Two identical 10-lb slender rods AB and BC are welded together to form an L-shaped assembly which is suspended from a hinge at B and is at rest in a vertical plane. A 0.03-lb bullet strikes the assembly with a velocity of 1800 ft/s perpendicular to BC. Knowing that the angular velocity of the assembly is 2 rad/s immediately after the bullet becomes embedded, determine the distanced.

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20 in.