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प्रश्न
36 men can do a piece of work in 7 days. How many men will do the same work in 42 days?
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उत्तर
Men: Days:: Men: Days
36 : 7 :: x : 42
∴ By inverse proportional
36 × 7 = x × 42
`⇒"x"=(36xx7)/42`
= 6 men
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