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A man travels the first part of his jour...

A man travels the first part of his journey at 80 km/h and the second part at 120 km/h, and covers a total distance of 3840 km to his destination in 40 hours. How long did the first part of his journey last?

A

24 hours

B

12 hours

C

18 hours

D

36 hours

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The correct Answer is:
A
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