Posted by **Delilah** on Wednesday, February 24, 2010 at 1:44pm.

A car travels at an average speed of 83.2 km/h for 1.00 h and then at an average speed of 42.4 km/h during a second hour. What is the car's average speed during the 2.00 h interval?

A car travels 0.98 km at an average speed of 83.2 km/h and then 0.99 km at an average speed of 42.4 km/h. What is the car's average speed during the 1.97 km interval?

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