A grapefruit is thrown with a velocity of 50 ft/sec upwards, o the top of a 256- foot tall building. How long does it take for the grapefruit to

A grapefruit is thrown with a velocity of 50 ft/sec upwards, off the top of a 256- foot tall building. How long does it take for the grapefruit to reach, and splatter all over,the sidewalk below? How fast is the grapefruit traveling when it hits the ground? What is the maximum height that the grapefruit reaches?