The diameter of the iron ball used for the shot-put game is 14 cm. It…

Question

The diameter of the iron ball used for the shot-put game is 14 cm. It is melted and then a solid cylinder of height 21/3 cm is made. What will be the diameter of the base of the cylinder ?

Accepted Answer

Option C. 28 cm. Answer & Solution Answer: Option C Solution: Let the radius of the cylinder be R Then, & × R^2 × 7/3 = 4/3 × 7 × 7 × 7 & R^2 = ( 4 × 7 × 7 × 73 × 3/7 ) & R^2 = 196 & R^2 = ( 14 )^2 & R^2 = 14 cm ∴ Diameter = 2R = 28