A train travelled from Delhi to Patna and back in a certain time at the rate of 60kmph.But if the train had travelled from Delhi to Patna at rate of rate 80Kmph. And back from Patna to Delhi at the rate of 40Kmph. It would take two hours Longer. Find the distance between Delhi and Patna?

• let the distance travalled be x
  then (x/80+x/60)-2x/60=2 hour
  so by solving x=480 km
• 12 years agoHelpfull: Yes(20) No(3)
• let distance=x
  2x/60-(x/80+x/40)
  =240 for going
  ence for to & fro 2*240=480
• 11 years agoHelpfull: Yes(3) No(0)
• ans=480
  480/60=8hr
  up and down so 16hr
  480/80=6hr for up
  480/40=12hr for down
  so 18 hr
  
• 12 years agoHelpfull: Yes(2) No(1)
• 480 km.
  
  If Distance between Delhi and Patna= x km. then
  Round trip time taken with speed of 60 kmph= 2x/60
  Time taken when travelled from Delhi to Patna @80 kmph and back from Patna to Delhi @40 kmph=(x/80)+(x/40)
  As later time is 2 hours more than previous, so (2x/60) +2 =(x/80) + (x/40)
  On solving x=480
• 8 years agoHelpfull: Yes(1) No(0)