Akshay travelled 2/5 of his journey at 50 km/h. The next 1/5 of his journey he travelled at 40 km/h. The remaining 40 km he covered in half an hour. How much time did he take for the whole journey?

• Here take total distance as x km..
  so 2/5+1/5 is completed means remaining 1-(2/5+1/5)= 2/5 distance..
  remaining distance(2/5) is equal to 40 kms.. so total distance= 100 km
  time taken to whole journey is 40/50+20/40+1/2= 1.8 hrs...
  
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• total time=(40/50)+(20/40)+(40/80)=1.8 hrs
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• 1 Hr. 48 Min.
  If total journey=x km., then
  (2x/5)+(x/5)+40=x, x=100
  Total time=[(2*100/5)/50]+[(100/5)/40]+(1/2)
  =(4/5)+(1/2)+(1/2)
  =9/5 =1 4/5 =1 hour 48 minutes
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