A car covered first half of the distance between two place at speed of 40km/h and second first half in 60km/h calculate the average speed
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let the distance = 240x Km.
first half 120x covered in 120x/40=3x hour
2nd half covered in 120x/60=2x hour.
avrg speed=240x/(3x+2x)=48km/h
first half 120x covered in 120x/40=3x hour
2nd half covered in 120x/60=2x hour.
avrg speed=240x/(3x+2x)=48km/h
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