Percentage Practice Test 7 with solutions

Question : 40 of 40

Marks: +1, -0

z = x ^2/y

and x, y both are increased in value by 10%, then the value of z is :

Solution:

z = x ^2/y

∴ New value of z

=(110/100x)^2/(110/100y)=11/100 x^2/y=11/10z

∴ Increase percentage

=(11/10z-z)/z×100=10%

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