The bases of a hemisphere and a cone are equal. If their heights are also equal then ratio between their curved surface area is—
Choose the correct choice from the following
A) 1 : √2
B) √2 ∶1
C) 1 : 2
D) 2 : 1
E) None of these
both having same radius and the heights are same. So height of cone is same as the radius.   2πr^2 / πrl   2r/√(r^2+h^2) , where πr gets cancelled on both sides and l^2=r^2+h^2   2r/√(2r^2) , r=h   2/√2   √2/1   ANSWER:√2 ∶1
<result>B</result>
The bases of a hemisphere and a cone are equal. If their heights are also equal then ratio between their curved surface area is—