A can complete a journey in 19 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.
Answer: D. 224 km
Let the total distance be X km.
Then,
=> 15x = 168 x 20 => x = [(168 x 20)/15] = 224 km.