A woman complete a journey in 10 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.  Answers.
A) 334 km.
B) 216 km.
C) 314 km.
D) 224 km.
E) 544 km.
D   224 km.   0.5x/21 + 0.5x/24 = 10   --&gt; x/21 + x/24 = 20   --&gt; 15x = 168 x 20   --&gt; x = (168 x 20)/15 = 224 km.
<result>D</result>
A woman complete a journey in 10 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.