Jim travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed. What is the average speed of Jim's travel in mph?

• ANS: 37.5 mph
  
  
  3 hours of his journey at 60 mph means 180 miles in 3 hours
  5 hours at 24 mph speed means 120 miles in 5 hours. In total 300 miles in 8 hours.
  Average Speed is ((3*60)+(5*24))/8 = 37.5mph
• 12 years agoHelpfull: Yes(6) No(0)
• ans=37.5mph
  case-1,
  t=3hr
  v=60mph
  so,d=v*t=60*3=180m
  case-2,
  t=5hr
  v=24mph
  d=24*5=120m
  total distance=120+180=300m
  total time=8hr
  therefore average speed=d/t= 300/8 = 37.5mph
• 9 years agoHelpfull: Yes(0) No(0)