Respuesta :

Answer: 5 hours

Step-by-step explanation:

4/5 = 1/3 hour.

1 hour = 12/5 miles swam, 2 2/5 = 2.4

2.4 x 5 = 12.

1 hour x 5 = 5 hours.

It took the group of penguins 5 hours to swim 12 miles.

Hope this helps!