anonymous
  • anonymous
Help me.. A car moves for half of its time at 80km/h nd for rest of time at 40km/h.total distance coverd is 60km..wat is averge speed of car?
Physics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
let h be x, so the velocity of car is 80x and 40x. total distance is 60km so according to the equation, velocity=distance divided by time; 120x =60 divided by x.. square root of 120 = 60 and when you go further you get x square = half. so finally, x equals 1 by 4. and total time is half an hour. so the average velocity is 60 divided by half = 120km/h
anonymous
  • anonymous
Thnku

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