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A man travelled 4/5 of his journey by train, 1/7 by bus and the remaining 16 km by auto. What is the length of his total journey ?

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Let the length of total journey = x km 

Travelled by train = 4/5 of x = 4x/5 km

Travelled by bus = 1/7 of x = x/7 km

Travelled by auto =16 km

⇒ x = 280 km 

Therefore, length of total journey = 280 km

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