40ft/sは何m/sですか？
40ft/s = 12.192m/s
12.192m/sを12m/sに丸めると1.575%ずれます。この値では小数を残したほうが安全です。
逆に40m/sは何ft/sですか？
40m/s = 131.2336ft/s
計算式: m/s = ft/s × 0.3048
ft/s → m/s 前後の値
22 ft/s6.7056m/s
24 ft/s7.3152m/s
26 ft/s7.9248m/s
28 ft/s8.5344m/s
30 ft/s9.144m/s
32 ft/s9.7536m/s
34 ft/s10.3632m/s
36 ft/s10.9728m/s
38 ft/s11.5824m/s
40 ft/s12.192m/s
42 ft/s12.8016m/s
44 ft/s13.4112m/s
46 ft/s14.0208m/s
48 ft/s14.6304m/s
50 ft/s15.24m/s
52 ft/s15.8496m/s
54 ft/s16.4592m/s
56 ft/s17.0688m/s
58 ft/s17.6784m/s
60 ft/s18.288m/s