A)
Velocity, v = sqrt[rg/sin(2 theta)]
v = sqrt[(220 x 9.8)/sin(90)]
v = 46.4 m/s
Horizontal component of velocity,
Vx = 46.4 cos(45) = 32.8 m/s
Time, t = 220/32.8 = 6.70 sec
B)
Time, t = sqrt(2y/g)
t = sqrt(2 x 6/9.8) = 1.12 sec
Required time, T = 6.7 - 1.12 = 5.58 sec
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