A man complete a journey in 20 hours. He travels first half of the journey at the rate of 10 km/hr and second half at the rate of 15 km/hr. Find the total journey in km.
Answers:
A) 220 km  B) 240 km  C) 230 km  D) 232 km  E) 234 km
0.5x/10 + 0.5x/15 = 20   --&gt; x/10+ x/15= 40   --&gt; 5x = 30x40   --&gt; x = (30x40)/5 = 240 km.   Answer : 240 km.
<result>B</result>
A man complete a journey in 20 hours. He travels first half of the journey at the rate of 10 km/hr and second half at the rate of 15 km/hr. Find the total journey in km.