Question

1. 25 men working 8 hours a day do a job in 63 days. How long would 45 men take to finish
the job, working 7 hours a day?​

Answer 1

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$Total \: work \: will \: remain \: same \: in \: both \: the \: situations. \\ Let's \: say the \: number \: of \: days \: taken \: by \: 45 \: men \: is \: 'x'.\\ \\</p><p>Therefore, \\ \\ </p><p></p><p> \implies25 \times 8 \times 63 = 45 \times 7 \times x \\ \\ </p><p></p><p> \implies25 \times 8 \times 63/45 \times 7 = x \\ \\ </p><p></p><p> \implies x = 5 \times 8 \\ \\ </p><p></p><p> = 40 \\ \\ \huge \boxed{x = 40}</p><p>\\ \\ Hence \: 45 \: men \: working \: 7 \: hours \: a \: day \: will \: take \: 40 \: days \: to \: complete \: the \: work.$

5 men working 7 hours a day will take 40 days to complete the work.

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Answer 2

Answer:

Total work will remain same in both the situations. Let's say the number of days taken by 45 men is 'x'.

Therefore,

25*8*63 = 45*7*x

25*8*63/45*7 = x

x = 5*8

= 40

Hence 45 men working 7 hours a day will take 40 days to complete the work.

Hope this helps you