Answer
4 minutes 37.35 seconds.
Work Step by Step
Speed=$\frac{\text{distance}}{\text{time}}=\frac{1\,mi}{(3\times60\,s)+43.13\,s}$
$=\frac{1\,mi}{223.13\,s}\times\frac{1609\,m}{1\,mi}\times\frac{1\,km}{1000\,m}$
$=0.007211\,km/s$
Time=$\frac{\text{distance}}{\text{speed}}=\frac{2\,km}{0.007211\,km/s}=277.35\,s=4\,min\,37.35\,sec$
