Answers

2016-03-31T16:54:58+05:30
Given ratio of x& y is 7:4
=> x=7k & y=4k
(x^2-y^2)/(x^2+y^2)
=(49k^2 - 16
k^2)/(49k^2 + 16k^2)
= 33k^2/65k^2
=>
(x^2-y^2)/(x^2+y^2) = 33/65
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