Standing on the roof of a 66 m tall building, you throw a ball straight up with an initial speed of 12.5 m/s. If the ball misses the building on the way down, how long will it take from you threw the ball until it lands on the ground below? Give your answer in seconds and round the answer to three significant figures.
The Attempt at a Solution
I'm not sure how to answer this. How do I know how high he throws it initially? [/B]