kill(all);

fpprintprec:7$

van=facebook.com/LearningCalculus$

length:4.8 * m * 100 * cm / m;

radiusExternal: 15 * cm;

radiusInternal: 15 * cm - 50 * mm * (1 * cm) / (10 * mm);

volumeCylinder(r,h):= %pi*r^2*h;

netVolume = volumeCylinder(radiusExternal, length)-
            volumeCylinder(radiusInternal, length);

float(%);

% * 1 * m^3/(100 * cm * 100 * cm * 100 * cm);