Question 1149913
.
<pre>

{{{pi*r^2*0.15}}} = 500


{{{r^2}}} = {{{500/(3.14*0.15)}}} = 1061.57 cm^2


r = {{{sqrt(1061.57)}}} = 32.58 cm


Diameter = 2*r = 2*32.58 = 65.16 cm.    <U>ANSWER</U>
</pre>