A robot moving forward at a constant speed takes 2.5 hours to travel 1 kilometer. Moving forward at this same constant speed, it takes the robot 90 seconds to travel the length of a particular hallway. How many meters long is the hallway?
+36915 1000 m / 150 min x 1.5 min = ......... m
1 km = 1000 m
2.5 hr = 150 min
90 sec = 1.5 min
