What is the ratio of the volumes of a right cylinder to that of a right cone having equal diameters?  Choices:  A) 1:3  B) 3:1  C) 2:3  D) 3:2  E) None of these
SOLUTION :   volume of cylinder : volume of cone   pr2h : 1/3 pr2h = 3 : 1   ANSWER IS 3:1
<result>B</result>
What is the ratio of the volumes of a right cylinder to that of a right cone having equal diameters?