Brick question

Hi,

In the last week of my Ironman training plan (!), and the workout states:

Swim 45m
Open water if possible.
Continuous swim. 1st 200m at RPE 9-10, then settle into race pace

Bike 2m
180 minutes at RPE 3-4

Swim-Bike Brick


Any suggestions on what this means for the bike? Do they mean two minutes? Two miles? I HOPE two miles wouldn't take me 180 minutes!!

Thanks for any clues,
Mike