Question 469349
How much of a head start does train A have?
{{{ d[1] = 50*1 }}}
{{{ d[1] = 50 }}} mi
Start a stopwatch when train B leaves station
You can think of this situation as one train
being stationary and the other train traveling
at the sum of their speeds
{{{ 270 = 50 + (50 + 60)*t }}}
{{{ 270 = 50 + 110t }}}
{{{ 110t = 220 }}}
{{{ t = 2 }}} hrs
Train B has been traveling for 2 hrs when A and B
are 270 mi apart
Train A has been traveling for {{{ 2 + 1 = 3 }}} hrs
when A and B are 270 mi apart