The correct option is C (30+x50)s.
Given, rabbit is 30 feet away from its burrow.
Speed of rabbit = 25 feet per second
Time taken by rabbit to reach its burrow =3025=65=1.2s
From the figure it is clear that Coyote is (30+x) feet away from the burrow and his speed is 50 feet per second.
So, expression for time taken by coyote to reach the rabbit's burrow =(30+x50)s.