If the triangle ABC in the Question 7 above is revolved about the side 5 cm, then find the volume of the solid so obtained. Find also the ratio of the volumes of the two solids obtained in Questions 7 and 8.

If the triangle is revolved about 5 cm side, a cone will be formed with radius
r = 12 cm, height h = 5 cm slant height l = 13 cm.
Volume of solid = 1/3 πr²h = 1/3 × π × 12 × 12 × 5 = 240π cm³
Hence, the volume of solid is 240π cm³.