1.

In a bulletthe gun powder is to be filledup insidethe metallic enclosure . The metallic enclosureis made up of a cylindrical base and conical top with the base of radius 5 cm. The ratio of height of cylinder and cone is 3:2 . A cylindrical hole dirlled through the metal solid with height two - third the height of metal solid. What should be the radiusof the hole , so that the volume of the hole ( in which gun powderis to be filled up ) is one-third the volume ofmetal solid after drilling ?

Answer»

a. `sqrt((88)/(5))`cm
B. `sqrt((55)/(8))`cm
C. `(55)/(8) cm `
d. `33pi cm `

Answer :B


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