Question

a right triangle PQR with sides 6cm,8cm and 10cm is revolved around the side of lemght is 8cm find the volume of the cone so generated​

Answer 1

When a right triangle with sides 6 cm, 8 cm and 10 cm is revolved about the side 8 cm, then solid formed is a cone whose height of a cone, h = 8 cm and radius of a cone, r = 6 cm. Slant height of a cone, l = 10 cm

Volume of a cone = 1/3 πr²h = (1/3) x (22/7) x 6 x 6 x 8

⇒ 6336/21 = 301.7 cm³