The correct answer is: mass of an animal = 306.12 kg
Step-by-step explanation:
Given:
Weight = W = 3000N
Mass = m = ?
We can use the equation of weight to find the mass of the animal, which is:
weight = mass * acceleration-due-to-gravity
W = m * g --- (A)
Where,
acceleration-due-to-gravity = g = 9.8

Plug in the value in equation (A) in order to find the mass (m):
(A) => 3000 = m * 9.8

m = mass of an animal = 306.12 kg