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12 men can finish a piece of work in $25$ days the number of days in which the same work can be done by $20$ men

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10

days

12

days

15

days

14

days

answer is C.

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Detailed Solution

Men	Days
$x_{1} = 12$	$y_{1} = 25$
$x_{2} = ?$	$y_{2} = 20$

Men and Days are inversely proportionate

$x_{1} \times y_{1} = x_{2} \times y_{2}$

$25 \times 12 = 20 x_{2}$

$x_{2} = \frac{25 \times 12}{20}$

$x_{2} = 15$ days

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12 men can finish a piece of work in 25 days the number of days in which the same work can be done by 20 men

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12 men can finish a piece of work in $25$ days the number of days in which the same work can be done by $20$ men