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niswa1gm
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A metal storage tank with volume 5m^3 is to be constructed in the shape of a right circular cylinder surmounted by a hemisphere. What dimensions will require the least amount of metal? (Hint: for atleast amount of metal, the surface area should be a min)
 2 years ago
 2 years ago
niswa1gm Group Title
A metal storage tank with volume 5m^3 is to be constructed in the shape of a right circular cylinder surmounted by a hemisphere. What dimensions will require the least amount of metal? (Hint: for atleast amount of metal, the surface area should be a min)
 2 years ago
 2 years ago

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jaersyn Group TitleBest ResponseYou've already chosen the best response.1
so v=(pi)r^2 * h + (2/3)(pi)r^2?
 2 years ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.1
surface area = (pi)r^2 + 2(pi)rh + 2(pi)r^2
 2 years ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.1
for volume plug in 5 for v and calculate h in terms of r
 2 years ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.1
[5  (2/3)(pi)r^2] / (pi)r^2 = h
 2 years ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.1
5/(pi)r^2  (2/3) = h
 2 years ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.1
surface area = 3(pi)r^2 + 2(pi)rh plug in for h 3(pi)r^2 + 2(pi)r[5/(pi)r^2  (2/3)] = 3(pi)r^2 + 10/(pi)r  4(pi)r/3
 2 years ago

niswa1gm Group TitleBest ResponseYou've already chosen the best response.0
thanks a bunch!
 2 years ago
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