CBSE Class 10 Answered
Ncert Book Wuestion
Asked by pranavalwar | 01 Sep, 2009, 07:12: PM
We assume you are refering to the following problem statement.
NCERT Class X, Chapter 3, Ex. 13.1 Q3.
Solution.
Total surface area of the toy = Curved surface area of the cone + Curved surface area of the hemisphere.
= πrl + 4πr2/2
Height of the cone = total height - radius of the hemisphere = 15.5 - 3.5 = 12 cm
Slant height of the cone, l = (122 + 3.52) =
156.25 = 12.5 cm
Hence
= (3.14)(3.5)(12.5) + 2(3.14)(3.5)2
= 137.38 + 76.93
= 214.31 cm2
Regards,
Team,
TopperLearning.
Answered by | 02 Sep, 2009, 12:31: AM
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