A woman complete a journey in 15 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 one.
A) 336 km.	B) 216 km.	C) 314 km.	D) 224 km.	E) 544 km.
0.5x/21 + 0.5x/24 = 15   --&gt; x/21 + x/24 = 30   --&gt; x = 336 km.   336 km.
<result>A</result>
A woman complete a journey in 15 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.