Two projectiles are launched from two different heights, as shown in the figure. Projectile A,on the left, is launched from a 30 m building, with an initial speed of 50 m/s in a horizontaldirection. Projectile B, at right, it is launched from a building 100 m from the other buildingand from a height of 15 m. It is also known that the Projectile B is launched at an angle of135° with respect to the horizontal, with unknown initial velocity. Find:a) The initial velocity with which projectile B is launched.b) The time elapsed from when the projectiles are launched to when they crash into eachother.30m√(4)100m2-18)15m135°

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