Given that the mini car covers 1/20 of the length of the classroom in 4/5 seconds, let's find the total time it will take to cover the entire length of the classroom.
Let T be the total time in seconds
[tex]\frac{1}{20}\text{ of T = }\frac{4}{5}\sec onds[/tex][tex]T=\frac{4}{5}\div\frac{1}{20}[/tex]Now, change the division sign to multiplication and flip the fraction on the right.
[tex]T=\frac{4}{5}\times\frac{20}{1}=\frac{80}{5}=\text{ 16 seconds}[/tex]Therefore, it will take the mini car 16 seconds the travel the entire length of the classrom.
ANSWER:
16 seconds
