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Decimals in Weight Measurement

If x and ...

Question

If $x$ and $y$ are directly proportional and $y = 20$ when $x = 4$ , find y when $x = 6$

A

25

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B

30

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C

24

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D

36

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Solution

The correct option is B $30$
$x = 4, y = 20$
$x = 1, y = \frac{20}{4} = 5$
$x = 6, y = 5 \times 6 = 30$

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