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. Answers:  A) 220 km  B) 224 km  C) 230 km  D) 234 km  E) 240 km
0.5x/21 + 0.5x/24 = 10   x/21 + x/24 = 20   15x = 168 x 20   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.