If x percent of x is equal to y/5 and the square difference of x and 10 is equal to square of y. val

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27 Mar 2013 problem

If x percent of x is equal to y/5 and the square difference of x and 10 is equal to square of y. value of y is

OPtion

1) 2
2) 4
3) 6
4) 8
5) 10
6) 12
7) 14
8) 16
9) 18
10) None of these

Solution

x*x/100=y/5 (i)
x^2-10^2=y^2 (ii)
solve the equations
then y = 10 (with both sign)
option (5)

Correct Option: 5 Best Solution (0)