Question

walking down a long moving escalator, phil covered the 75 m distance in 25 s. walking back up against the motion of the escalator, the same distance was covered in 75 s. what is the speed of the escalator?

Answer 1

Letting Vw = Phil's walking speed and Ve = the escalator's speed;

Vw + Ve = 75/25 = 3m/s
Vw - Ve = 75/75 = 1m/s
Adding,
2Vw = 4 making Vw = 2m/s and Ve = 1m/s.

Answer 2

When Anthony went bass fishing, he rowed 4 km against the current in 2 hr. On his return trip, he still had 1 km to go to his starting point after he had been traveling for 0.5 hr. Find Anthony's rate of rowing in still water and the speed of the current.