The elevator need to climb 117 feet and it reaches 117 feet in 6.5 seconds only. Now, let’s solve for the unit rate of the elevator. What is it’s speed. => 117 feet is the distance that the elevator needs to climb. => 6.5 seconds is the now. To find the speed let’s follow that formula. S = d/t => 117 feet / 6.5 seconds => 18 feet per seconds Unit rate of the elevator speed = 18 feet/s