The volumes of two cones are in the ratio 1 : 10 and the radii of the cones are in the ratio of 1 : 2. What is the length of the wire?
Options:	A) 2:5	B) 1:5	C) 3:5	D) 4:5	E) 6:5
The volume of the cone = (1/3)Ï€r2h   Only radius (r) and height (h) are varying.   Hence, (1/3)Ï€ may be ignored.   V1/V2 = r12h1/r22h2 =&gt; 1/10 = (1)2h1/(2)2h2   =&gt; h1/h2 = 2/5   i.e. h1 : h2 = 2 : 5   2:5NSWER 2:5
<result>A</result>
The volumes of two cones are in the ratio 1 : 10 and the radii of the cones are in the ratio of 1 : 2. What is the length of the wire?