Question

A and B walk up an escalator one step at a
time, while the escalator itself moves up at a
constant speed. A walks twice as fast as B. A
reaches the top in 40 steps and B in 30 steps.
How many steps of the escalator can be seen
when it is not moving?
A. 30
B. 40
C. 50
D. 60​

Answer 1

Answer:

d was the correct answer