Respuesta :
Welcome to Brainly!
The total trail length is 5.4 km. If we subtract the distance already covered, the result will be the remaining distance to hike:
5.4 km - (2.4 km/hr)((3/4) hr = (5.4 - 1.8) km.
Tom has 3.6 km left to hike to reach the end of the trail.