If necessary, round your answers to 1 decimal digit.

1 a.

Julia rides her bike for 4.2 hours with a constant speed of 17 km/h and then for another 4 hours 38 minutes with a constant speed of 15 km/h. What is her average speed for the total trip?

2 a.

A police car drives for 3 hours with a constant speed of 64 km/h and then for another 1 hour 3 minutes with a constant speed of 79 km/h. What is its average speed for the total trip?

3 a.

An airplane flies for 3.1 hours with a constant speed of 760 mph and then for another 33 minutes with a constant speed of 740 mph. What is its average speed for the total trip?

Page 2

Answer Key

1 a.

Her average speed is 16 km/h.

2 a.

Its average speed is 67.9 km/h.

3 a.

Its average speed is 757 mph.

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