Question

The maximum height/attaoned by a projectile is 4m and horizontal range is 12 m ,angle=

Answer 1

Hey dude here is your answer
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the correct answer is angle 3
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I hope this helps you

Answer 2

нєу тнєяє ιѕ αиѕωєя

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H  = (R tan Ф ) / 4 
4  = (12 tan Ф ) / 4

tan Ф = 4/3        sin 2Ф = 2 tan Ф / (1 + tan² Ф)  = 0.96

R = u² sin 2Ф / g  

u² =  12 * g / 0.96  = 25 g /2 

u = 5 √(g/2)