Mathematics, 04.04.2020 09:03, alex43079
Tommy likes to run up and down and "up" escalator. Going up, he can cover 30 steps in 6 seconds. Going down, it takes him 15 seconds to cover 30 steps. Find Tommy's rate (in steps per second) if the escalator stopped moving.
Answers: 1
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Tommy likes to run up and down and "up" escalator. Going up, he can cover 30 steps in 6 seconds. Goi...
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