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On a shopping trip, Iryna drove 6 km at 60 km/h, 3 km at 90 km/h and 2 km at 30 km/h. Find her average speed for the whole trip.

Enter only numerical answer with no space and round your answer to the nearest hundredth (if needed). 

 May 13, 2021
 #1
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Average speed = total distance / total time

   (6 km + 3 km + 2km)  /  (6 km/60 km/hr   +  3 km / 90 km/hr  +  2 km / 30 km/hr)

 

11  /  ( 1/10 + 1/30 + 1/15) = _______________ km / hr

 May 13, 2021

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