Radius = X
Height = y
Volume or W = 1/3 * x^2 * y * pi = (x^2ypi)/3
3 times --> Radius = 3x
Height = 3y
VOlume = 1/3 * pi * (3x)^2 * 3y = 9x^2y*pi
W = (x^2ypi)/3
Vol. = 9x^2y*pi
W * 27 = Vol.
27W
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cii) Radius = 2x
Height = y
Vol. = 1/3 * pi * (2x)^2 * y = (4x^2ypi)/3
W = (x^2ypi)/3
W * 4 = Vol.
Therefore, 4W
PS : Volume of a cone = 1/3*pi*r^2*h