A spacecraft starts from rest, and makes a journey to a destination $381000km$ from its starting point. It does so by accelerating at a constant rate of $19\mathrm{.}72\frac{m}{s^{{?}^{{?}^{?}}}}2$ up to the midpoint of the journey, and then decelerates at the same constant rate of $19\mathrm{.}72\frac{m}{s^{{?}^{{?}^{?}}}}2$ for the second half of the journey, ending at rest. How long did the entire journey take?

$1hr44$min

$5$ hr $22$ min

$2$ hr $41$ min

$2$ hr $27$ min