It depends what you are rounding to. If rounding to the nearest whole number, it would be 41. If rounding to the nearest tenth, it would not change. If you were rounding to the nearest ten, it would be 40.
41
41
41
40.5
41.26 rounded to the nearest whole number is 41.
0.4
0.4
41.0
40
if you round off to the nearest one then its 41, if you round off to the nearest ten, it is 40.
41 ft