The volumes of two cones are in the ratio 1 : 35 and the radii of the cones are in the ratio of 1 : 2. What is the length of the wire?	Choose the correct choice from the following answers:  A) 7:5  B) 2:9  C) 7:2  D) 2:2  E) 2:8
The volume of the cone = (1/3)πr2h   Only radius (r) and height (h) are varying.   Hence, (1/3)π may be ignored.   V1/V2 = r12h1/r22h2 =&gt; 1/35 = (1)2h1/(2)2h2   =&gt; h1/h2 = 7/5   i.e. h1 : h2 = 7:5   7:5nswer: 7:5
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The volumes of two cones are in the ratio 1 : 35 and the radii of the cones are in the ratio of 1 : 2. What is the length of the wire?