Maximum height toh 20.4 meters aayega, kyuki v^2 = u^2 + 2as use kiya. Wapas aane ka total time 4.08 second lagega, ek upar jaane ka time 2.04 second hoga. Par didi, asli height pata chalti hai jab thaili bhar papad leke chadhte ho purane school ki doosri manzil tak, saans chadh jaati hai! Calculation sahi hai, lekin haath mein bojha hoga toh 20 meter bohot ooncha lagta hai.
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