Two high-speed ferries leave at the same time from a city to go to the same island. The first ferry, the Cat, travels at 33 miles per hour. The second ferry, the Bird, travels at 22 miles per hour. In how many hours will the two ferries be 55 miles apart?

5 hours

Step-by-step explanation:

Since first travels at 33 mph and second one travels at 22 mph, in 1 hour, the Cat will be ahead by 33 - 22 = 11 miles

How long will it take for him to be 55 miles ahead (apart) ?

Simple.

11 miles in 1 hour means 55/11 = 5 hours it will take to be 55 miles apart.

So, it would take 5 hours