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A can 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 can 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

Let the distance be x So,12x21 + 12x24 = 10⇒x21 + x24 = 20⇒15x  =  168×20⇒x  = 168×2015∴ 224km

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