Question 204655
For the truck:
{{{d = r*t}}}
{{{d = 45*1}}}
{{{d = 45}}} mi
The airport is 45 mi away
Halfway there is {{{22.5}}} mi
The truck has driven for {{{.5}}} hr
and has {{{.5}}} hr to go to the airport
In {{{.5}}} hr, the taxi goes
{{{d = 50*.5}}}
{{{d = 25}}} mi
When the truck reaches the airport, the 
taxi is {{{45 - 25 = 20}}} mi from the airport