In the formula V = 1/(5r)^2, if r is halved, then V is multiplied by  Choose the correct answer.
A) 64
B) 8
C) 1
D) 1/8
E) 4
Say r=2 =&gt; V1 = 1/100   when r=1; V2 = 1/25   V2 = 4*V1.   Answer=44* 1.= 
<gadget id="calculator">4* 1.</gadget>
<output>4</output>
4=4
<result>E</result>
In the formula V = 1/(5r)^2, if r is halved, then V is multiplied by