Math
posted by Whitney .
Kevin and Rob are standing on opposite sides of Edmonton's River Valley. In order to see a boat on the river, Kevin has to look down 32°, and Rob has to look down 38°. The width of the valley is 750m, and the boat is exactly between Kevin and Rob. How much higher is Rob than Kevin?

If their heights are k and r, then
k/375 = sin 32°
r/375 = sin 38°
So, the difference is
rk = 375(sin38°sin32°)