To solve for average speed ypu need to divide the distance and the time, remember that the formula for finding the average speed is S = D ÷ T.
Solution:
It would take Richard to swim in 2m/sec
Remember that the speed answers the question "how fast" while on the time answers for "how long" and the distance answers for the "measurement of the two positions".
Hope it helps (ू•ᴗ•ू❁)