Question

An elevator descends 1,500 feet in 60 seconds, how do you find the change in height per second?

Answer 1

Change in height is `25` feet per second

Explanation:

In `60` seconds change in height of elevator is `1500` feet

In `1` second change in height of elevator will be `1500/60` feet

= `(3xx5xx10xx10)/(2xx3xx10)`

= `(cancel3xx5xxcancel10^5xxcancel10)/(cancel2xxcancel3xxcancel10)`

= `5xx5`

= `25` feet.