ABSTRACT
Howmuch time passes between the departure of the first ship and the last? Solution: p. 89
My sister plays the two opponents at the same time. Solution: p. 89
The wind increased the travel time. Solution: p. 90
We may assume that the trip to his friend’s took the same amount of time as the return trip home. In what sense was setting the clock in motion important, if it doesn’t give the exact time?
