Question 1048094
You can think of this as one of them
standing still and the other one traveling
at the sum of their speeds
-------------------------
Let {{{ s }}} = the speed of the aircraft carrier in km/hr
{{{ s - 5 }}} = the speed of the container ship in km/hr
-------------------------
{{{ 540 = ( s + s - 5 )*6 }}}
{{{ 540 = ( 2s - 5 )*6 }}}
{{{ 540 = 12s - 30 }}}
{{{ 12s = 570 }}}
{{{ s = 47.5 }}}
and
{{{ 47.5 - 5 = 42.5 }}}
----------------------
The aircraft carrier's speed is 47.5 km/hr
----------------------
check:
{{{ d[1] = 47.5*6 }}}
{{{ d[1] = 285 }}} km
and
{{{ d[2] = 42.5*6 }}}
{{{ d[2] = 255 }}} km
-------------------
{{{ d[1] + d[2] = 285 + 255 }}}
{{{ d[1] + d[2] = 540 }}} km
OK