Question 66474
The key is - the faster one will go further
in the same amount of time
d = distance the slower one goes
d + 72 = distance the faster one goes
{{{d / 30 = t}}}
{{{(d + 72) / 46 = t}}}
{{{d / 30 = (d + 72) / 46}}}
{{{30d + 72*30 = 46d}}}
{{{16d = 2160}}}
{{{d = 135}}}
{{{d / 30 = t}}}
{{{135 / 30 = t}}}
{{{t = 4.5}}} hours for the slower one to go 135 miles
{{{(d + 72) / 46 = t}}}
{{{207 / 46 = t}}}
{{{t = 4.5}}} hours for the faster one to go 135 + 72 miles