Question 1167285
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A router is in the library of the university which is 1.5 {{{highlight(cross(years))}}} {{{highlight(highlight(meters))}}} away from a student lounge. 
The range of the router, which services the WIFI connection of the university, has a diameter of 3.5 meters, 
with it as the center. Can students staying in the lounge connect to the said WIFI? 
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Yes,  they can,  if they are located closer to the router than   {{{3.5/2}}} = 1.75  meters.