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).
+36915 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
