WELL first off, the two of them have abilities that can assist them in a quicker journey there and back! Bakugo is able to propel himself in the air with his explosions and he can go as fast as a car, and Todoroki can do the same by using his ice powers to slide along the ground. Could that knock off a day or two?

For the real meat of the investigation, Bakugo orders Todoroki to freeze the bear and so Todoroki will start by forcing it back with ice spikes, and then he will immediately follow up with a technique known as Heaven Piercing Ice Wall which is an attack that encases enemies in ice. Usually he'd go big with it, but since it's a small space he opts for a room sized ice wall instead.