Mensurationeasy · Past Paper
What is the total surface area of a cone of radius 'r' and slant height 'l'?
Aπrl
Bπr(r+l)
C2πr(r+l)
Dπr²l
✓ Correct Answer: B — πr(r+l)
TSA of cone = Area of base + Curved surface area = πr² + πrl = πr(r+l).
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