When a man stands on a moving escalator he goes up in 500 sec . And when he walds up the moving escalator he goes up in 30 sec . Then the man walks up the stationary escalator in a time of

When a man stands on a moving escalator he goes up in 500 sec . And wh

1.	When a man stands on a moving escalator he goes up in 500 sec . And when he walds up the moving escalator he goes up in 30 sec . Then the man walks up the stationary escalator in a time of
Answer» ANSWER :75 SEC