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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.

Correct Answer: 224 km

Explanation:


(1/2)x + (1/2)x = 10
21 24



x + x = 20
21 24


⟹ 15x = 168 x 20



x = 168 x 20 = 224 km.
15


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