Question 410351
They approach at the sum of their speeds
Think of one plane not moving and the other
moving at {{{s + s + 65}}}
{{{2745 = (2s + 65)*3}}}
{{{2745 = 6s + 195}}}
{{{6s = 2550}}}
{{{s = 425}}}
and
{{{s + 65 = 490}}}
Their speeds are 425 and 490 mi/hr
check:
{{{d[1] = 425*3}}}
{{{d[1] = 1275}}}
and
{{{d[2] = 490*3}}}
{{{d[2] = 1470}}}
{{{d[1] + d[2] = 2745}}}
OK