Question

A high -speed elevat6 can rise 480 feet in 30 seconds. which expression represent the rate, in fret per minute, of elevator?

Answer 1

If an elevator rises 480 feet per 30 seconds, then it would rise 960 feet per minute.

You get this answer by doubling 480 because there are 60 seconds in a minute, and you have to also double 30 seconds to get 60 seconds. 960ft/1min is the answer.