 A can complete a journey in 19 hours. He travels first half of the journey at the rate of

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.

Option:

A. 220 km

B. 230 km

C. 226 km

D. 224 km

Answer: D . 224 km

Justification:

Let the total distance be X km.

Then,

=> 15x = 168 x 20 => x = [(168 x 20)/15] = 224 km.