Question 63570
d = distance between towns
{{{d = r[1] * t[1]}}}
{{{d = r[2] * t[2]}}}
where
{{{r[1]}}} = speed of the 1st train in km/hr
{{{r[2]}}} = speed of 2nd train in km/hr
{{{t[1]}}} = time of travel of 1st train in hrs
{{{t[2]}}} = time of travel of 2nd train in hrs
{{{d = 80t[1]}}}
{{{d = 48t[2]}}}
problem says {{{t[2] = t[1] + 2}}}
{{{d = 48 * (t[1] + 2)}}}
{{{80t[1] = 48 * (t[1] + 2)}}}
{{{80t[1] = 48t[1] + 96}}}
{{{32t[1] = 96}}}
{{{t[1] = 3}}}
{{{d = 80t[1]}}}
{{{d = 80*3}}}
{{{d = 240}}}
the towns are 240 km apart