If necessary, round your answers to 1 decimal digit.

1 a.

Noah roller skates 13.2 miles with a constant speed of 6 mph and another 74 miles with a constant speed of 15 mph. What is his average speed for the total trip?

2 a.

John rides his bike 11.4 km with a constant speed of 19 km/h and another 10.9 km with a constant speed of 8 km/h. What is his average speed for the total trip?

3 a.

An airplane flies for 2 3/4 hours with a constant speed of 864 km/h and then for another 40 minutes with a constant speed of 1080 km/h. What is its average speed for the total trip?

Page 2

Answer Key

1 a.

His average speed is 12.2 mph.

2 a.

His average speed is 11.3 km/h.

3 a.

Its average speed is 906.1 km/h.

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