Question 744932
Think of one plane as standing still and the
other approaching at the sum of their speeds.
Equation for the moving plane:
{{{ 200 = ( 350 + 400 )*t }}}
{{{ 200 = 750t }}}
{{{ t = 200/750 }}}
{{{ t = .2667 }}} hrs
{{{ .2667*60 = 16 }}} min
They will meet in 16 min