Find the volume of solid generated by revolving the circle x^2+y^2=25 about y axis
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equation of circle is ...
x² + y² = 25
from this equation we get, centre of circle is (0,0) and radius of circle is 5 unit. now when we revolve the circle about y - axis. a solid sphere forms as shown in figure.
now volume of spherical solid , V = 4/3πr³ unit³
= 4/3 π (5)³ unit³
= 500π/3 unit³
hence, volume of solid is 500π/3 unit³
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