How long does the awning need to be so the shadow will extend ten feet from the trailer?

Question

The location Tom has decided to park his motor home faces due south. He wants to shade an area ten feet in front of the south side of his trailer with an awning which is nine feet high. Using his GPS receiver, he has determined the exact latitude of the camper is 26.25degrees. He knows that to calculate the angle of elevation of the sun at noon on June 21st, he needs to subtract the latitude from 90 and add 23.5.

Answer 1

90° - 26.25° + 23.5° = 87.25°
L = 10 - 9/tan(87.25) = 9 ft. 6.8124 in.