Answer:
20 metres per second (m/s) is approximately 45 miles per hour (mi/h).
To convert 20 meters per second (m/s) to miles per hour (mph), you can use the following conversion factors:
1 meter = 0.000621371 miles
1 hour = 3600 seconds
First, convert meters to miles:
20 m/s * 0.000621371 miles/meter = 0.01242742 miles per second (mi/s)
Now, convert mi/s to mph by multiplying by the number of seconds in an hour (3600):
0.01242742 mi/s * 3600 s/hr = 44.738712 mi/h
So, 20 m/s is approximately equal to 45 mi/h when rounded to the nearest ones place.