A man complete a journey in 10 hours. He travels first half of the journey at the rate of 20 km/hr and second half at the rate of 20 km/hr. Find the total journey in km.
Pick one:  A) 220 km  B) 224 km  C) 230 km  D) 232 km  E) 200 km
0.5x/20 + 0.5x/20 = 10   --&gt; x/20 + x/20 = 20   --&gt; 2x = 20 x 20   --&gt; x = (20x20)/2 = 200 km.   Answer : 200 km.
<result>E</result>
A man complete a journey in 10 hours. He travels first half of the journey at the rate of 20 km/hr and second half at the rate of 20 km/hr. Find the total journey in km.