The unit rate is 8.7 meters per hour.
We have to determine the unit rate 21 3/4 meters in 2 1/2 hours.
According to the question
The unit rate is determined by dividing the two measures of unit rates following all the steps given below.
The unit rate is 21 3/4 meters in 2 1/2 hours.
Then,
[tex]\rm = \dfrac{21\dfrac{3}{4}}{2\dfrac{1}{2}}}\\\\[/tex]
[tex]= \dfrac{\dfrac{21\times 4+3}{4}}{\dfrac{2\times 2+1}{2}}\\\\\\= \dfrac{\dfrac{84+3}{4}}{\dfrac{4+1}{2}}\\\\\\ = \dfrac{\dfrac{87}{4}}{\dfrac{5}{2}}\\\\\\= \dfrac{87}{4}\times \dfrac{2}{5}\\\\= \dfrac{174}{20}\\\\= 8.7[/tex]
Hence, The unit rate is 8.7 meters per hour.
To know more about Unit Rate click the link given below.
https://brainly.com/question/14487358
