Physics, 18.08.2019 03:20, trillsmith

After taking the metro to dupont circle in washington, dc, jess reached street level by walking up the escalator at a brisk rate, taking 70 steps during the trip to the top. suddenly curious about the length of the escalator, jess returned to the bottom and walked up the same escalator at a leisurely rate, taking steps two fifths often as on the first trip, taking 40 steps in all. how many steps can be seen on the visible part of the escalator?

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After taking the metro to dupont circle in washington, dc, jess reached street level by walking up t...