If a semi circular metal sheet of radius r is used to make a largest cone then the volume of the cone is?
a. 3πr³/8
b. √3πr³/24
c. √2πr³/12
d. π r³/12
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a. 3πr³/8
b. √3πr³/24 ✓
c. √2πr³/12
d. π r³/12
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