Question

An escalator in a department store is to carry people a vertical distance of 20 feet between floors. How long is the escalator if it makes an angle of `60^circ` with the ground?

Answer 1

I got `23"ft"`

Explanation:

Consider the diagram:

from Trigonometry we get:

`20=dsin(60^@)`

rearranging:

`d=20/(sin(60^@))=23"ft"`