2- The circle ² + (y-2a)² = 4a² is rotated about the line y = -1 where a > 0. A torus is obtained from this rotation. Determine a if the surface area of the obtained torus is 24m². (Hint: Use Pappus Theorem) a)a= 2 b)a=1 c)a= 3 d)a= 4 e) None

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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The circle + (y – 2a)2 = 4a² is rotated about the line y=-1 where a > 0. A torus is
obtained from this rotation. Determine a if the surface area of the obtained torus is 247.
(Hint: Use Pappus Theoremn)
2-
a)a = 2
b)a = 1
c)a = 3
d)a = 4
e)None
Transcribed Image Text:The circle + (y – 2a)2 = 4a² is rotated about the line y=-1 where a > 0. A torus is obtained from this rotation. Determine a if the surface area of the obtained torus is 247. (Hint: Use Pappus Theoremn) 2- a)a = 2 b)a = 1 c)a = 3 d)a = 4 e)None
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