A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?

Name: A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?
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Question

Quizplus · Accepted Answer

The total distance is (3.0 h * 80 km/h) + (2.0 h * 100 km/h) = 240 km + 200 km = 440 km. The total time is 3.0 h + 2.0 h = 5.0 h. The average speed is total distance divided by total time: 440 km / 5.0 h = 88 km/h.

A Motorist Travels for 3