Question

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If y is directly proportional to 1÷x and x = 2 when y = 20, what is the value of
x when y = 1.25

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Answer 1

y=(1/x)×k

where k= constant

put, x=2 & y=20,

20=k/2=> k=40,

now,

1.25=40/x

=>. x=40/1.25=>. x=32
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