The time taken to do a piece of work is inversely proport...
The time taken to do a piece of work is inversely proportional to the number of men employed. if it takes 45 men to do a piece of work in 5 days, how long will it take 25 men?
15 days
12 days
5 days
9 days
Correct answer is D
The time (t) to do the work is inversely proportional to the number of workers (n).
⟹t∝1n
t=kn
5=k45⟹k=45×5=225
∴
For 25 men, t = \frac{225}{25} = 9
\therefore 25 men will do the work in 9 days.
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