A man covers 1/4 of his journey at 20 km/hr and the remaining at 30 km/hr. He takes 15 hour in total journey. The distance total journey is ?

 

  • Option 1)

     

    400 km  

     

  • Option 2)

     

    390 km   

     

  • Option 3)

     

    440km

     

  • Option 4)

     

    420 km

     

  • Option 5)

     

    460 km   

     

Answers (1)

If the distances are x/4 & 3x/4 respectively.

As per the given data,

\frac{\frac{x}{4}}{20}+\frac{\frac{3x}{4}}{30}= 15

\frac{x}{80}+\frac{3x}{120}=15

9x = 15 x 240

x = 400

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