Problema Solution
Find the volume V of the solid generated when the circle x^2+(y-a)^2=r^2 is rotated about the x-axis. (0
Answer provided by our tutors
the centre of thge circle is(0,a) and radius r
the curve is a toroid of area pi*r^2
the circumference of centre of rotating disk=2*pi*a
The volume is 2*pi*a*pi*r^2=2pi2 ar2