The rabbit runs 80 steps before the dog can catch up, the rabbit runs 8 steps, the dog only needs 3 steps, the dog runs 4 steps and the rabbit runs 9 steps. How many steps does a dog have to run to catch up with the rabbit?
Rabbits run 8 steps, dogs only need 3 steps, dogs run 4 steps, rabbits run 9 steps,
In other words, the rabbit runs 32 steps, the dog only needs 12 steps and the dog runs 12 steps. The rabbit ran 27 steps.
Every time a dog runs 12 step, it runs 32-27=5 steps more than a rabbit.
80÷5= 16
16× 12= 192
A dog must run at least 192 steps to catch up with a rabbit.