ANSWER
[tex]\text{6.67 cm/min}[/tex]EXPLANATION
We want to convert 4 metres per hour to centimetres per minute.
To do that, we have that 4 m/h means:
[tex]\frac{4\text{ metres}}{1\text{ hour}}[/tex]So, to convert to centimetres per minute, we convert the numerator to centimetres and convert the denominator to minutes:
[tex]\begin{gathered} 1\text{ metre = 100 centimetres} \\ 1\text{ hour = 60 minutes} \\ \Rightarrow\text{ }\frac{4\cdot\text{ 100 centimetres}}{1\cdot\text{ 60 minutes}} \\ \Rightarrow\text{ 6.67 cm/min} \end{gathered}[/tex]