A cyclist had to ride 48km with a certain pre-assigned average speed. However, he rode the first 24 km with a speed reduced by 20% and the next 24 km with a speed exceeding the pre-assigned speed by 2 kmph . He took 5 hours to complete the trip . find the pre-assigned speed with which he had intended to travel.

1) 10 kmph
2) 8 kmph
3) 13 kmph
4) 16 kmph

• 10 kmph
  
  if x kmph is speed, then
  
  24/0.8x + 24/(x+2)=5
  
  x=10 kmph
  
  check
  24/8 +24/12= 3+2=5 hrs
• 12 years agoHelpfull: Yes(1) No(0)