Question 1076207
The first road location, the second road location, and the tower form a triangle.  The distance between the first two road locations is 1.85 miles.


The interior angle at first road location,  19 degrees, given.
The INTERIOR angle at second road location will be  180-31=149 degrees.


THe interior angle at the tower,  180-19-149=12 degrees.


"At that moment", distance from the second road location to the tower, {{{t}}}:    Use Law Of Sines...
{{{highlight(sin(19)/t=sin(12)/1.85)}}}
Solve for t.




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Draw the triangle to see more clearly.


{{{74(miles/hour)*(1/3600)(hours/seconds)*90*seconds=1.85*miles}}}