If you ride your bike 30 kilometers in 2 hours, what is your average speed?

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

How to do this , and can some one explain

What describes horizontal cross section of the right rectangle 6m 8m 5m