A woman complete a journey in 30 hours. She travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.	Choose the correct choice from the following choices:
A) 334 km.
B) 216 km.
C) 314 km.
D) 224 km.
E) 672 km.
0.5x/21 + 0.5x/24 = 30   --&gt; x/21 + x/24 = 60   --&gt; x = 672 km.   672 km.
<result>E</result>
A woman complete a journey in 30 hours. She travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.