Mark wants to set the record for most consecutive ropes jumped.  The record is 54,000.  He can jump 3 times a second.  How many hours would he need to jump rope?
He can jump 3*60=<<3*60=180>>180 times per minute
So he can jump 180*60=<<180*60=10800>>10,800 per hour
So it would take him 54,000/10,800=<<54000/10800=5>>5 hours
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