a ratio b/w the speed of a truck,car and train 3:8:12,car moved uniformly covered a distance of 1040 km in 13 hrs ,wt is d avg speed of truck n train together?

• speed of car =80kmph
  
  8parts equal to 80 hence speed of truck is 30 speed of train is 120 there average is 75kmph
  
• 9 years agoHelpfull: Yes(0) No(1)