i travel with the speed of 2x, 3x and 5x for 3hr, 5hr and 7hr respectively. My average speed for entire journey was 65.33km/hr. what is my slowest speed ?
(A)20 (B)40 (C) 50 (D) 60

• Ans=35 km/hr
  Total distance = 2x*3+3x*5+5x*7= 56x
  Time required=3+5+7=15 hr
  Average Speed=56x/15 =65.33 km/hr ,So x=65.33*15/56 = 17.5
  Slowest speed= 2*x=2*17.5= 35 km/hr
• 11 years agoHelpfull: Yes(2) No(0)