If 2.5 x = 0.02y, then what is the value of\frac{ y- x }{y +x} ?

RRB NTPC Prelims Model Paper 4 with solutions

Question : 39 of 100

Marks: +1, -0

If 2.5 x = 0.02y, then what is the value of

{ y- x }/{y +x} ?

Solution:

(1) 2.5 x = 0.02 y ⇔ y = 125 x

∴{y-x}/{y+x}={125 x-x}/{125 x+x}=124/126

=62/63

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