Answer:
2.67 seconds
Step-by-step explanation:
Distance covered by the dog = 40 ft
The rate at which the dog runs (speed) = 15 ft/s
But,
speed = [tex]\frac{distance}{time}[/tex]
So that,
time = [tex]\frac{distance}{speed}[/tex]
= [tex]\frac{40}{15}[/tex]
= 2[tex]\frac{2}{3}[/tex]
time = 2.6667 s
It would take the dog 2.67 s to mess.
