Question 945169
Let R=large radius, S= small radius, L=length
Volume (large)={{{V=pi(R^2)*L}}}
Volume (small)={{{V=pi(S^2)*L}}}
Volume (foam)= Volume (large) - Volume (small)
{{{Volume (foam)=(pi(R^2)*L)-(pi(S^2)*L)}}} factor out pi(L)
{{{Volume (foam)=pi(L)(R^2-S^2)}}} Enter values
{{{Volume (foam)=pi(100 ft)(10^2-2^2)}}}
{{{Volume (foam)=pi(100 ft)(100-4)}}}
{{{Volume (foam)=pi(100ft)(96 sq ft)}}}
{{{Volume (foam)=(9600 cu ft)pi}}}=(9600 cu ft)(3.14)=30144 cu ft
ANSWER Volume of foam is 30144 cubic feet.