Not sure if my 270 RKS with three slides is the same but it is 13' 4" slides out.
I just made some reservations for a Badlands trip and some parks ask how many slides, one or both sides and an extended width.
2019 Outdoors RV Blackstone 270RKS Titanium
04 Country Coach 33' Allure Seaside ISL 400
24' Wildcat 5th Wheel -- Lance Truck Camper x 2