Задача id10222
A subway escalator, moving uniformly, lifts a passenger standing motionless on it within one minute. On a stationary escalator, a passenger, moving uniformly, ascends in 3 minutes. How many seconds will it take a passenger to ascend an upward escalator?
Detailed solution. Format jpg
Оплата и выдача товара осуществляются через партнёрскую платформу.