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     EduGorilla 
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    A train travelling at the rate of 60 km per hour meets another train of half its length inside a tunnel travelling at 90 km/h and crosses it completely in 4½ seconds. Find the length of the tunnel if the first train passes completely through it in 4 minutes 37½ seconds.

    Options :-

    1. 3.4 km
    2. 4.5 km
    3. 5.5 km
    4. 6.4 km
    5. 8 km
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