A right triangle ABC with sides 5cm, 12cm and 13cm is revolved about the side 12 cm. Find the volume of the solid so obtained.
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Solution
Height (h) = 12 cm
Radius (r) = 5 cm, and
Slant height (l) = 13 cm Volume of cone, V=13πr2h V=13×π×52×12 =100π cm3 Volume of the cone formed is 100π cm3.