A ball is drawn from a top of height H it covers a distance of x/2 in the last second of its motion . How long does the balll remain in air ?

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एक गेंद को h ऊँचाई की मीनार के शीर्ष से गिराया जाता है। यह अपनी गति के अंतिम सेकण्ड में

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