Rahat completes 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. 121 km
B. 242 km
C. 112 km
D. 224 km
E. None of these
সঠিক উত্তরঃ
D.
224 km
Explanation:
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