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Inverse Proportions

If 8 men can ...

Question

If 8 men can do a job in 5 days. How much time would v10 men take to do the same job?

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Solution

'W' work can be completed by 8 men in: 5 days

Work done by 8 men in one day= W/5

Work done by 1 man in one day= W/40

Work done by 10 men in one day= (W/40)10

Time taken by 10 men to complete 'W' work is:

=W/((W/40)10)=W/(W/4)= 4 days.

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