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bii17
 3 years ago
The base diameter and altitude of a right circulAR cone are observed at a certain instant to be 10 and 20 inches respectively. if the lateral area is constant and the base diameter is increasing at a rate of 1 inch per cubic minute, find the rate at ehich the altitude is decreasing
bii17
 3 years ago
The base diameter and altitude of a right circulAR cone are observed at a certain instant to be 10 and 20 inches respectively. if the lateral area is constant and the base diameter is increasing at a rate of 1 inch per cubic minute, find the rate at ehich the altitude is decreasing

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bii17
 3 years ago
Best ResponseYou've already chosen the best response.1hmm yes.. he formula is LA = pi*r*L

Gowthaman
 3 years ago
Best ResponseYou've already chosen the best response.01 inch per cubic minute .... means what ? i am not understanding ' CUBIC MINUTE'

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1im sory it's 1 inch per minute

Gowthaman
 3 years ago
Best ResponseYou've already chosen the best response.0LA = pi*r*L , and here L is slant height

Gowthaman
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1348992383404:dw

Gowthaman
 3 years ago
Best ResponseYou've already chosen the best response.0is it 1/ sqrt(2) inch/ min

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1the answer will be 2.25 in per min @Gowthaman

Gowthaman
 3 years ago
Best ResponseYou've already chosen the best response.0then somewhere i missed, i check once again

Gowthaman
 3 years ago
Best ResponseYou've already chosen the best response.0but now i got .25 inch/min

Gowthaman
 3 years ago
Best ResponseYou've already chosen the best response.0dh/dr =1/2 (from condition of constant LS area) and dr/dt = 1/2 inch/min (given in the problem) dh/dt = dh/dr x dr/dt =  1/2 x 1/2 =  1/4 = 0.25 inch / min

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1348995046484:dwdw:1348995119250:dwdw:1348995143495:dw

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1348995200114:dw

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.2I hope u can solve it from here...

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1@sauravshakya hey stil there?

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1@sauravshakya what is that?? i didnt understand those with circle..

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.2That is radius of the cone

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.2ALSO,dw:1349001642850:dw

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1@hartnn can u help me in this question?

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.0which part of saurav's explanation did u not understand?

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1here.. dw:1349002226151:dw i used it but i didnt get the correct answer the answer should be 2.25 @hartnn

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.0@bii17 i did get it as 2.25. l^2=425, r=5, h=20, dr/dt=2

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1349002789725:dw i get is 8 @hartnn

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.0oh sorry, dr/dt = 1/2 and not 2

bii17
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1349002976588:dw my answer is 2.. :( @hartnn can u show me what u did?

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.0did u get that u missed the *minus* sign in the beginning ?
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