Question 986973: A speedboat travels at 60km/hr for two hours and then at 90km/hr for one hour. Find its average speed over the three hours Found 2 solutions by ankor@dixie-net.com, ikleyn:Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! A speedboat travels at 60km/hr for two hours and then at 90km/hr for one hour. Find its average speed over the three hours:
:
we need to know how far, in how may hours. S = dist/time
Find the dist
2*60 = 120 km
1*90 = 90
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total 210 km
:
S =
S = 70 km/h over 3 hrs
