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Question

If x varies inversely as y, and x=5 when y=2 then for y=5, x is

A
25
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B
2
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C
52
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D
none of these
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Solution

The correct option is B 2
Given, x varies inversely as y
x=k1y where k is a constant
Now given that, at x=5,y=2 putting this in above equation
5=k(1/2)k=10
Thus our equation becomes x=ky=10y
Hence at y=5,x=105=2

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