At the same moment from the top of a building 3.0 × 10 2 m tall, one rock is dropped and one is thrown downward with an initial velocity of 29 m/s. both of them experience negligible air resistance.

At the same moment from the top of a building 3.0 × 10 2 m tall, one rock is dropped and one is thrown downward with an initial velocity of 29 m/s. both of them experience negligible air resistance. how much earlier does the thrown rock strike the ground?