x varies inversely as square of y. Given that y=3 for x=1. The value of x for y = 4 will be equal to:  Choose the most appropriate option:
A) 3
B) 6
C) 1/9
D) 1/3
E) 9/16
Explanation :   Solution: Given x = k/y^2, where k is constant. Now, y=3 and x =1 gives k = 9.   .'. x = 9/y^2   =&gt; x =9 /4^2 = 9/16   Answer : 9/16
<result>E</result>
x varies inversely as square of y. Given that y=3 for x=1. The value of x for y = 4 will be equal to: