Question 964659
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V=volume; r=radius; h=height
{{{V=(1/3)(pi)r^2h}}}
{{{(3V)/((pi)h)=r^2}}}
{{{r=sqrt((3V)/((pi)h))}}}
{{{r=sqrt((3(150ml))/((pi)9cm))}}}
{{{r=sqrt(450cm^3/28.3cm)}}}
{{{r=sqrt(15.9cm^2)}}}
{{{r=3.99cm}}}
{{{d=2r}}}={{{2(3.99cm)=7.98cm}}}
ANSWER: Diameter of the top of the glass is 7.98cm.