Question

Suppose Josh drives the 45 miles from Appleton to Berwyn at the constant speed of 30
miles per hour. On the return trip, he drives from Berwyn to Appleton at the constant
speed of 60 miles per hour.
(a) What is Josh's average speed for the drive from Appleton to Berwyn and back?
(b) What is the average of Josh's speeds driving from Appleton to Berwyn and from
Berwyn to Appleton?
(c) Explain why the Josh's average speed for the round trip is less than the average of the
two speeds.
(d) Explain the dierence between "average rate of change" and "average of rates of
change."

Answer 1

His average speed is just total distance traveled over total time spent.