Answer:
[tex]400\text{ cm}[/tex]Explanation:
Here, we want to convert from meters to centimeters
Mathematically, we know that there are 100 cm in 1 m
Thus, the number of cm in 4 m will be:
[tex]\text{ 4 }\times\text{ 100 = 400 cm}[/tex]The room will be 400 cm long