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OpenStudy (anonymous):
a runner is exercising by going up 4 steps then down 3 steps on a flight of 20 stairs.it takes him 5 seconds to run up and down.he does this for 1 minute.what step does he end up on?
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OpenStudy (anonymous):
please help!
OpenStudy (anonymous):
(4-3) steps = 5 seconds 1 min = 12 steps Therefore the runner ends on the 12th step
OpenStudy (anonymous):
@HawkCrimson Was right
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