Question

A stone is thrown from the top of a building at an angle of 30 degrees to the horizontal and with an initial speed of 20 m/s

A stone is thrown from the top of a building at an angle of 30 degrees to the horizontal and with an initial speed of 20 m/s. If the height of the building is 45 m, find a) the time it takes for the stone to reach the ground, b) the distance between the object and the building.
**I need to know step by step how to solve it. The teacher already went over it and I get the basics but I still would like to know how to do it.

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