Question

an escalator can move 30 people per minute from the main level to the upper level. How long would it take to use the escalator to move 100 people?

Answer 1

3.33 minutes

Explanation:

first know that the escalator can move 30 people in 1 minute.

then, we can write in a mathematical expression as:

30 people = 1 minute

100 people = ? minutes.

cross multiply, i.e. 30×? = 100×1

therefore, ? = 100/30

? = 3.33 minutes.

therefore, it's going to take 3.33 minutes for the escalorr to take 100 people.