Answer:2.53°
Explanation:The ball is undergoing a projectile motion that is why it has an angle
Range = (U^2 sin2a)/g
U= velocity of the ball=100ft/sec
Range of the ball(i.e horizontal distance the ball crossed)= 30yard=90ft
a=angle the ball is projected
g= acceleration due to gravity=9.8m/s^2
90=(100^2×sin2a)/9.8
90×9.8=10000×sin2a
882/10000=sin2a
0.0882=sin2a
Sin^-1 0.0882=2a
5.06=2a
a=5.06/2
a=2.53
