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How long will it take a 60kg man to climb a height of 22m if...

Physics
JAMB 1988
How long will it take a 60kg man to climb a height of 22m if he expended energy at a rate of 0.25kW. [g = ms-2]
  • A. 5.3s
  • B. 34.5s
  • C. 41.6s
  • D. 52.8s
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Correct Answer: Option D
Explanation
power = mgh

0.25 x 103 = \(\frac {60 \times 10 \times 22}{t}\)

t = 52.8 sec
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