Answer : The speed in meters per second is 17.89 m/s
Explanation :
The conversion used from miles to kilometer is:
1 mile = 1.61 km
The conversion used from kilometer to meter is:
1 km = 1000 m
So, 

The conversion used from hour to second is:
1 hr = 3600 s
So, 

As we are given the speed 40.00 miles per hour. Now we have to determine the speed in meter per second.
As, 

So, 

Therefore, the speed in meters per second is 17.89 m/s