A rock is thrown horizontally off of building A with the initial velocity of v. It impacts the ground at a distance of d away from the base of the building. A rock with the same physical properties is thrown horizontally off of building B with the same initial velocity and it lands a distance of 2d (twice as far as the first rock) away from the base of the building. What is the ratio of the height of building A to the height of building B?
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