SOLUTION: Rates and ratios 1. on a 2 hour journey pertov drove at 90km/h for the first hour and 50km/h for the second hour. what was the average speed? 2. on a 200km journey, ogla drove

Question 899368: Rates and ratios
1. on a 2 hour journey pertov drove at 90km/h for the first hour and 50km/h for the second hour. what was the average speed?
2. on a 200km journey, ogla drove at 90km/h for he first 100km and 50km/h for the rest. what was her average speed?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
1. (90+50)km/2hr = 70kmph
2. (90+110)km/3.3hr = 60.6kmph Note: and
the Idea is (Total miles)/(Total Time) = average speed
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