Q. A car travels 8 km in the first quarter of an hour, 6 km in the second quarter and 16 km in the third quarter. The average speed of the car in km per hour over the entire journey is

• avg. speed= total distance/time
  distance=8+6+16=30km
  time=3/4hr so avg speed=30/(3/4)=40kmph
• 11 years agoHelpfull: Yes(13) No(1)
• total distance covered= (8*0.25)+(6*0.25)+(16*0.25)=7.5 km
  total time taken= 0.75 hr
  speed= 7.5/0.75=10 kmph
• 11 years agoHelpfull: Yes(0) No(4)
• Total distance travelled 54 km so in 1 hour it travelled 1/3 Rd more so average speed 54+1*54/3=72 km/hr
• 8 years agoHelpfull: Yes(0) No(1)