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Solution


Q.

A boy throws a ball into air at 45° from the horizontal to land it on a roof of a building of height H. If the ball attains maximum height in 2 s and lands on the building in 3 s after launch, then the value of H is _______ m.    (g=10m/s2)                                                 [2026]
1 25  
2 15  
3 20  
4 10  

Ans.

(2)