



 
Hi Rita. You are setting up the solution properly. Since it is y you need to find, you need to eliminate x from the two equations. When you solve each equation for x, you get x = y/tan11.5 Two things that both equal the same third thing equal each other, so this means y/tan11.5 = 2640 + y/tan23.9 Solving this for y gives: y = 2640 / ( cot 11.5  cot 23.9 ) If you punch that into your calculator you will solve the problem and get a height of y = 993 ft. However, this is NOT the height of Uluru (Ayers Rock) according to the Australian Government and other sources which list it as 348 meters (1142 ft) high. Perhaps ChunWei needs to recalibrate his scope! Cheers,  


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