Cat + Rabbit = 10
Dog + Rabbit = 20
Cat + Dog + Rabbit + Rabbit = 30
Cat + Dog = 24
(Cat + Dog + Rabbit + Rabbit) - (Cat + Dog) = Rabbit + Rabbit = 6
If 2 Rabbits = 6, then 1 Rabbit must have a mass of 3 kg.
Cat + Rabbit = 10
Dog + Rabbit = 20
Cat + Dog + Rabbit + Rabbit = 30
Cat + Dog = 24
(Cat + Dog + Rabbit + Rabbit) - (Cat + Dog) = Rabbit + Rabbit = 6
If 2 Rabbits = 6, then 1 Rabbit must have a mass of 3 kg.