Question 195505
I don't understand your question regarding where I got the 6.
There is no 6 in this problem other than the 1.6 meters for Joe's height.
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1.6/2=x/(2+3)
1.6/2=x/5
2x=5*1.6
2x=8
x=8/2
x=4 feet is the height of the floodlight.