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anonymous
 one year ago
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?
anonymous
 one year ago
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?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0let 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
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