Water is dropped at the rate of 
into a cone of semi-vertical angle 
. If the rate at which periphery of water surface changes when the height of the water in the cone is 2 m is 
, then the value of 
is
Water is dropped at the rate of into a cone of semi-vertical angle . If the rate at which periphery of water surface changes when the height of the water in the cone is 2 m is , then the value of is
Question ID - 153404 | SaraNextGen Top Answer
Water is dropped at the rate of into a cone of semi-vertical angle . If the rate at which periphery of water surface changes when the height of the water in the cone is 2 m is , then the value of is
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Water is dropped at the rate of |
1 Answer
127 votes
Answer Key / Explanation : (5) -
(5)
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We have
(1)
Now, perimeter 
(2) (Using equation (1))
When 
Hence 
127 votes
Answer Link
127