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Question

A man travelled two-fifth of his journey by train, one-third by bus, one-fourth by car and the remaining 3 km on foot. What is the length of his total journey?

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Solution

Let his total journey length be x.
Given distance travelled by train = 25x,
distance travelled by bus = 13x
and distance travelled by car=14x
Total journey travelled by train, bus and car = 25x+13x+14x
=(12×2x) + (20×x) + (15×x)60 [LCM~of~5, 3 and 4=60]
=24x + 20x + 15x60=59x60
Therefore, Remaining journey =60x6059x60=60x59x60=x60

According to the question, remaining journey is 3 km.
x60=3
x=3×60=180 km.
Hence, the length of his total journey is 180 km.


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