A man complete a journey in 10 hours. He 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.	Choices.
A) 220 km B) 224 km C) 230 km D) 232 km E) 234 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.   Answer : 224 km.
<result>B</result>
A man complete a journey in 10 hours. He 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.