If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is

If a particle is projected inside a horizontal tunnel which is 554 cm

1.	If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is
A.	8°
B.	9°
C.	10°
D.	11°
Answer» D. 11°