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The time taken to do a piece of work is inversely proportional to the number...

Mathematics
JAMB 2005
The time taken to do a piece of work is inversely proportional to the number of men employed. If it takes 30 men to do a piece of work in 6 days, how many men are required to do the work in 4 days?
  • A. 20
  • B. 35
  • C. 45
  • D. 60
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Correct Answer: Option C
Explanation
t = time taken and N = number of men
t ∝ 1/N
t = K/N
K = Nt
K = 30 * 6
K = 180
∴t = 180/N
4 = 180/N
4N = 180
N = 180/4
45 men

There is an explanation video available below.

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Explanation Video

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Post UTME Past Questions Agent
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