A spherical glass vessel has a cylindrical neck 8cm long, 2cm in diameter, the diameter of the spherical part is 8.5cm. By measuring the amount of water it holds, a child finds its volume to bt `354cm^(3)` Check whether she is correct , taking the above as the inside measurements , and `pi=3.14` .

A spherical ball of radius 3 cm is melted and recast into three spherical balls. The radii of two balls are 1.5 cm and 2 cm. find the diameter of the third ball.

IF the volume of right circular cone of height 9 cm is 48 pi cm^(3). Find the diameter of its base.

A iron pillar consists of a cylindrical portion of 2.8 m height and 20 cm in diameter and a cone of 42 cm height sumounting it. Find the weight of the pillar if 1 cm^3 of iron weights 7.5 g.

The inner diameter of a cylindrical wooden pipe is 24 cm and its outer diameter is 28 cm. The pipe is 35 cm long . Find the mass of the pipe if 1cm^(3) of wood has a mass of 0.6 gm .

The inner diameter of a cylindrical wooden pipe is 24 cm. and its outer diamter is 28 cm. The length of the pipe is 35 cm. Find the mass of the pipe, if 1 cm^(3) of wood has a mass of 0.6g.

Rachel, an engineering student, was asked to make a model shaped like a cylinder with two cones attached at its two ends by using a thin aluminum sheet. The diameter of the model is 3 cm and its length is 12 cm . If each cone has a height of 2cm , find the volume of air contained in the model that Rachel made . ( Assume of outer and inner dimensions of the model to be nearly the same .