A surveyor standing next to a hut on one side of a river

Last updated: 7/10/2022

A surveyor standing next to a hut on one side of a river sights a boulder on the other side and determines the angle from the hut to the boulder is 70°. She then walks 100 meters parallel to the river until she arrives at a tree. The angle to the boulder from the tree is 32°. How far from the hut is the boulder? 56.4 meters 104.1 meters 54.2 meters 96.1 meters