Question 1025024
[ gallons of fuel ] / [ gallons/hr ] = [ hrs available ]
{{{ 30 / 10 = 3 }}} hrs
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[ mi/hr ] x [ hrs ] = [ miles of range ]
{{{ 110*3 = 330 }}} mi range
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An extra {{{ 15 }}} mi/hr adds {{{ 15*3 = 45 }}} mi of range
A loss of {{{ 15 }}} mi/hr subtracts {{{ 15*3 = 45 }}} mi of range
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{{{ 330 - 45 = 285 }}} mi
{{{ 330 + 45 = 375 }}} mi
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The possible search range is anything 
between 285 mi and 375 mi