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Surface Area of Revolution Worksheet

Surface Area of Revolution Worksheet
  • Page 1
 1.  
Find the area of the surface obtained by rotating the curve y = 2x + 1, 1 ≤ x ≤ 2 about x-axis.
a.
163π
b.
45π
c.
165π
d.
85π


Answer: (d)


Correct answer : (4)
 2.  
Find the area of the surface obtained by rotating the curve y = 2, 0 ≤ x ≤ 1, about y-axis.
a.
2π
b.
π2
c.
4π
d.
π4


Answer: (c)


Correct answer : (3)
 3.  
Find the area of the sphere of radius r, obtained by rotating a semi circle about the x-axis.
a.
2πr
b.
4πr
c.
4πr2
d.
2πr2


Answer: (c)


Correct answer : (3)
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