Final answer:
It will take approximately 89.7 seconds to reach the restaurant by elevator.
Step-by-step explanation:
To determine how long it will take to reach the restaurant by elevator, we can use the concept of average speed. Average speed is given by the formula: average speed = total distance / total time. In this case, the total distance is 500 feet and the total time is 90 seconds. Therefore, the average speed is 500 feet / 90 seconds = 5.56 feet per second. Since we know the average speed and the distance, we can rearrange the formula to solve for time. Time = distance / speed. Plugging in the values, we have: time = 500 feet / 5.56 feet per second = 89.7 seconds.
Therefore, it will take approximately 89.7 seconds to reach the restaurant by elevator.