In the formula A = 22/7*b^2, if b is halved, then A is multiplied by	Choices.
A) 4  B) 1/8  C) 1/4  D) 8  E) 1/2
Say b=2 =&gt; A1 = 88/7   when r=1; A2 = 22/7   A2 = 1/4*A1.   Answer : 1/4
<result>C</result>
In the formula A = 22/7*b^2, if b is halved, then A is multiplied by