Question

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 :

• A. 220 km
• B. 224 km
• C. 230 km
• D. 234 km

Answer 1

Answer:

B. 224 km

Let the total distance of the journey be 2x km Time taken to travel first half of the journey = x/21 hours Time taken to complete other half = x/24 hours Total time = x/21 + x/24 hours 10 = (8x + 7x)/168 15x = 1680 x = 1680/15 x = 112 Total distance = 2x = 2 × 112 km = 224 km