A person drove at an average rate of 50 miles per hour for two hours and then increased average rate by 50% for the next 3 hours.If the average rate of speed for the 5 hours was t miles per hour. What is the value of t?

• dist traveled in 2 hrs=50*2=100
  and in next ((50*50)/100)=25
  so speed is 75mile per hrs
  dist traveled =75*3=225
  total dist=225+100=325
  speed =325/5=65
  65mph
  
• 11 years agoHelpfull: Yes(20) No(2)
• ans: 65 miles/hr
  
  Given speed1= 50 miles/hr
  Time= 2 hrs
  therefore,distance= 100 miles
  
  speed2=(speed1+50% of speed1)= 75 miles/hr
  time= 3 hrs
  therefore distance=225 miles
  
  total distance=100+225=325 miles
  total time=2+3=5 hrs
  Average speed=(325/5)=65 miles/hr.
• 11 years agoHelpfull: Yes(12) No(2)
• t = ( 2*50 + 3*75)/ 5 = 325/5 = 65 mph
• 11 years agoHelpfull: Yes(6) No(2)
• The value of t is 65
• 11 years agoHelpfull: Yes(2) No(0)
• By average concept v can find out this
  (50*2+75*3)/5= 65 mph
• 11 years agoHelpfull: Yes(2) No(0)