John weights 65.7 kg. If he reduces his weight in the ratio $5 : 4$ , find his reduced weight.

52.56 k g

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42 k g

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54.34 k g

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none of these

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Solution

The correct option is A $52.56 k g$
Let the previous weight be $5 x$ .
$5 x = 65.7$
$x = 13.14$
Therefore, the reduced weight = $4 \times 13.14 = 52.56 k g$

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