Question

A cylinder of radius 12cm contains water upto the height of 20 CM a spherical iron ball is dropped into cylinder anthers water level is raised by 6.75 cm what is the radius of the Ball

Answer 1

Given radius of the cylinder, r = 12 cm It is also given that a spherical iron ball is dropped into the cylinder and the water level raised by 6.75 cm Hence volume of water displaced = volume of the iron ballHeight of the raised water level, h = 6.75 m Volume of water displaced = πr2h = π × 12 × 12 × 6.75 cm3 ⇒ Volume of iron ball = π × 12 × 12 × 6.75 cm3 → (1) 
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