(b) A triangle PQR, where PQ = 9 cm, QR = 12 cm and PR = 15 cm, is rotate about the side QR to
trace out a cone. Find the volume and the total surface area of the cone.
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writing on paper plz wait.
if its right plz mark as brainliet.
Oh sorry . I mistook the diameter = 9.
plz take radius = 9
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