Answer:
40 seconds
Explanation:
A unicorn is running at rate of 3 meters/second. To find how long it'll take to get at the end of a 120 meter rainbow, we'll have to find the "time".
The distance is given to be 120 meters and speed is given as 3 meters/second.
Our formula for speed is:
[tex]\displaystyle{v = \dfrac{s}{t}}[/tex]
where v is speed, s is distance and t is time:
[tex]\displaystyle{3 = \dfrac{120}{t}}[/tex]
Solve for t, multiply both sides by t:
[tex]\displaystyle{3 \cdot t= \dfrac{120}{t}\cdot t}\\\\\displaystyle{3t= 120}[/tex]
Divide both sides by 3:
[tex]\displaystyle{\dfrac{3t}{3} = \dfrac{120}{3}}\\\\\displaystyle{t= 40 \ \, \sf{seconds}}[/tex]
Therefore, it will take 40 seconds for a unicorn to reach at the end of rainbow.
