Question 734758
Let {{{ w }}} = wind speed in km/hr
{{{ 500 - w }}} = speed of the plane flying into the wind
{{{ 500 + w }}} = speed of the plane flying with the wind
-------------
Flying into the wind:
{{{ 1040 = ( 500 - w )*(25/6) }}}
{{{ 6240 = 25*( 500 - w ) }}}
{{{ 6240 = 12500 - 25w }}}
{{{ 25w = 12500 - 6240 }}}
{{{ 25w = 6260 }}}
{{{ w = 250.4 }}}
--------------
This seems too high for wind speed.
I'll check it:
{{{ 1040 = ( 500 - w )*(25/6) }}}
{{{ 1040 = ( 500 - 250.4 )*(25/6) }}}
{{{ 1040 = 249.6*( 25/6 ) }}}
{{{ 1040 = 1040 }}}
OK