A surveyor measures the top of a building. The top of the building is 50 ft away from his angle-measuring device. His angle-measuring device is 4 ft...

A surveyor measures the top of a building. The top of the building is 50 ft away from his angle-measuring device. His angle-measuring device is 4 ft above ground. The angle of elevation to the top of the building is 63 degrees. How tall is the building?