Question

Steve gets on the elevator at the eleventh floor of a building and rises up at the rate of 57 floors per minute. At the same time Stephen gets on an elevator at the fifty first floor of the same building and goes down at the rate of 63 floors per minute. If they continue travelling at these rates then at which floor will their elevator cross each other?

Answer 1

Step-by-step explanation:

Let their paths cross after x minutes

 ⇒11 + 57x = 51 - 63x

⇒120x = 40

⇒x=1/3

 number of floors covered by David in (1/3) min =(1/3*57)

                                                                             =19

∴ their paths cross at (11 +19) that is  30th floor

pls mark my answer as brainlist answer