OpenStudy (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?

2 years ago
OpenStudy (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

2 years ago
OpenStudy (anonymous):

Thnku

2 years ago