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Discussion :: Time and Distance

  1. A man 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.
    2. A.

    220 km
    B.

    224 km
    C.

    230 km
    D.

    234 km

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    Answer : Option B

    Explanation :

    \(\frac { (1/2)X } { 21 }\)+\(\frac { (1/2)X } { 24 }\)=10

     

     \(\frac { X} { 2 1} \)+\(\frac { X} { 2 4} \)=20

     

     15x = 168 x 20

     

     x =\([\frac { 168*20 } {15 }] \)=224km

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