Question

An elevator car starts on the second floor of a building 27 feet above the ground. The car rises 4.2 feet every second on its way up to the 15th floor. Assuming the car doesn’t slow down or make any stops , how long will it take the car to reach a height of 102 feet above the ground?

Answer 1

Answer:

17.86 seconds

Step-by-step explanation:

The starting point of the elevator car = 27 feet above the ground

The endpoint point of the elevator car = 102 feet above the ground

The total distance traveled by the elevator car = 102 feet - 27 feet

The total distance traveled by the elevator car = 75 feet

Time taken by the elevator car to rise 4.2 feet = 1 second

Time taken by the elevator car to rise 75 feet = 75/4.2 seconds

Time taken by the elevator car to rise 75 feet = 17.86 seconds

Therefore, it takes the car 17.86 seconds to reach a height of 102 feet above the ground