Đáp án + Giải thích các bước giải:

`a,27,5m//s=27,5*3,6=99km//h`

                 `=99km//3600s=0,0275km//s`

`b,6,41km//h=6,41*100000cm//3600s=178,06cm//s`

                    `=6,41*1000m//60ph=106,83m//ph`

`c,220cm//s=2020/100m//s=20,2m//s`

                  `=(20,2)/1000//1/3600h=72,72km//h`

`d,789km//h=789*1000m//3600s=219,17m//s`

                   `=219,17*100cm//1/60ph=1315020cm//ph`

`e,36cm//s=36/100000km//1/3600h=1,296km//h`

                `=36/100m//s=0,36m//s`

`g,36,7m//s=(36,7)/1000km//1/3600h=132,12km//h`

                 `=36,7*100cm//s=3670cm//s`

`h,123km//h=123*1000m//3600s=34,17m//s`

                   `=34,17*100cm//1/60ph=205020cm//ph`

`i,3050cm//s=3050/100m//s=30,5m//s`

                   `=(30,5)/1000km//1/3600h=109,8km//h`

Đáp án:

\(\begin{array}{l}
a)\,27,5m/s = 99km/h = 0,0275km/s\\
b)\,6,41km/h = \dfrac{{3205}}{{18}}cm/s = \dfrac{{641}}{6}m/ph\\
c)\,2020cm/s = 20,2m/s = 72,72km/h\\
d)\,789km/h = \dfrac{{1315}}{6}m/s = 1315000cm/ph\\
e)\,36cm/s = 1,296km/h = 0,36m/s\\
g)\,36,7m/s = \dfrac{{367}}{{36}}km/h = 3670cm/s\\
h)\,123km/h = \dfrac{{205}}{6}m/s = 20,5cm/ph\\
i)\,3050cm/s = 3,05m/s = 10,98km/h
\end{array}\)