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webcalc84
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webcalc84
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2 Questions
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680
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+8
Boris on the escalator
Boris is playing on the mall escalators. One escalator goes up, one goes down, and one is out of service; otherwise, they're all identical. The up and down escalators go at the same speed. You can assume that Boris always runs at the same speed.
Boris
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webcalc84
Mar 17, 2020
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569
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robot
A robot moving forward at a constant speed takes 2.5 hours to travel 1 kilometer. Moving forward at this same constant speed, it takes the robot 90 seconds to travel the length of a particular hallway. How many meters long is the hallway?
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webcalc84
Mar 16, 2020