# Projectile motion of balls

Two balls $$A$$ and $$B$$ are thrown horizontally from a height of $$H,$$ as shown above. The horizontal throw lengths of $$A$$ and $$B$$ are $$R$$ and $$2R,$$ respectively. Let $$h$$ be the height of $$B$$ when its horizontal throw length is $$R.$$ What is the ratio $$h:H?$$

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