(b) A triangle PQR, where PQ = 9 cm, QR = 12 cm and PR = 15 cm, is rotate about the side QR totrace out a cone. Find the volume and the total surface area of the cone.?
(b) A triangle PQR, where PQ = 9 cm, QR = 12 cm and PR = 15 cm, is rotate about the side QR totrace out a cone. Find the volume and the total surface area of the cone.?