William W. answered 09/16/19
Math and science made easy - learn from a retired engineer
Seems to me that the easiest conversion to get to the answer being asked is to convert 8m/s into miles/hour
multiply/divide to get 17.895 miles/hour
To determine time, distance/speed = time [miles/(miles/hr) = hours] so 17/17.895 is the number of hours (don't forget to round to one sig fig)