Q.1 The radius of the base and the height of a right circular cone are 7cm and 24cm respectively. Find the total surface area of cone. O 1.1232cu.cm 0 2. 704 cu.cm 3. 704 sg.cm O 4.407sq.cm
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Answer:
Given : radius (r)=7 cm height (h)=2 cm Then
l2=h2+r2=242+72
or l=625 cm = 25 cm
Total surface area of the cone = Curved surface area + Area of base
=πrl+πr2=(722×7×25)+(722×7×7)=704cm2
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