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 B2 Given, x varies inversely as y ⇒x=k⋅1y 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