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roblesjairus
05.02.2020 •
Mathematics
Determine the volume of the right circular cone generated by rotating the line y = 1/3x about the y-axis between y = 0 and y = 3.
a) v = 81pi cu.units
b) v = 84pi cu.units
c) v = 82pi cu.units
d) v = 85pi cu.units
e) v = 83pi cu.units
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Ответ:
Below is the solution:
Rotating around the y-axis; solve for x. y = x/3
x = 3y
Find x^2
x^2 = 9y^2
Integrating it using the limits of 0 and 3, remember to add the pi and integrate 9y^2.
The answer is 81pi cubic units which is A.
Ответ: