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.**