A ball is thrown vertically upwards with an initial velocity such that it can reach a maximum he...

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A ball is thrown vertically upwards with an initial velocity such that it can reach a maximum height
Q of \( 15 \mathrm{~m} \). If, at the same instance, a stone is dropped from a height of \( 15 \mathrm{~m} \), find the ratio of distances travelled by them when they cross each other.
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