A paper of the shape of semi-circle is rounded to make a cone. If the radius of the semi-circle is 21 cm, find the curved surface area of the cone made from that paper.
Good one bro...I dint get it correct initially
hi muje bank po ka liye complete g.a .me ky ky padhna chahiye
And, r=21/2(as the circumfference of the base of the cone would be equal to the circum. of the semi-circle(πr).)
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No, 693 is write answer.
I am getting 379.5, is it rt