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The radius of the base of a cone is increasing at the rate of 3 cm/min and the altitude is decreasing at the rate of 4 cm/min. The rate of change of lateral surface when the radius is 7 cm and altitude is 24 cm is

a. 54 phi cm^2/min

b. 7 phi cm^2/min

c. 27 phi cm^2/min

d. none of these

User BLP
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1 Answer

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The answer is a 54 pho
User Suraj Shingade
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