Answer
The work done by each person, mgh, is the same because mass and height are the same. Because power is "work done divided by the time interval", page 112, the person who climbs in the shorter time uses more power.
Conceptual Physics (12th Edition)
by Hewitt, Paul G.
Published by
Addison-Wesley
ISBN 10:
0321909100
ISBN 13:
978-0-32190-910-7
Chapter 7 - Think and Explain - Page 129-130: 60
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