mathssurface area
posted by anoynomous .
there is a groove which is in a cylindrical form and is made in a cylindrical piece of wood of length 17.5cm. The groove is filled with graphite and the cylindrical graphite block is of same length as that of wooden piece. If the diameter of the graphite cylinder is 3mm and outer diameter of the wooden cylinder is 10mm. find the volume of the wood and volume of the graphite used

volume of whole cylinder
= π(5^2)(175) mm^3 = 4375π mm^3
volume of graphite
= π(1.5^2)(175
= 393.75π mm^3
volume of wood = 4375π  393.75π = 3981.25π mm^3
= appr 12507.5 mm^3
Respond to this Question
Similar Questions

Maths
The fuel rods for a certain type of nuclear reactor are bundled into a cylindrical shell. Consider this crosssection showing 19 identical fuel rods: a) If the diameter of the one rod is 2.8cm, calculate the shaded area of the crosssection. … 
Geometry
Jake has two similar cylindrical pipes. The radius of the first cylindrical pipe is 5 cm. The circumference of the second cylindrical pipe is 20π cm. The volume of the second cylindrical pipe is how many times greater than the … 
Plane and Solid Geometry
A piece of wood whose ends are square was cut from a cylindrical piece of wood which was cut from the same pieces of wood whose ends are squares 10 centimeter by 10 centimeter and length 20 centimeter. Find the volume of wood(smallest … 
maths plse help me..
A toy is in the shape of a right circular cylinder with hemisphere on one end and a cone on the other . The height and radius of the cylindrical part are 13 cm and 5 cm respectively. The radius of the hemispherical and conical parts … 
maths Surface area and all that..
A toy is in the shape of a right circular cylinder with hemisphere on one end and a cone on the other . The height and radius of the cylindrical part are 13 cm and 5 cm respectively. The radius of the hemispherical and conical parts … 
mathssurface area
Cylindrical groove is made in a cylindrical piece of wood of length 17.5cm. The groove is filled with graphite and the cylindrical graphite block is of same length as that of wooden piece. If the diameter of the graphite cylinder is … 
math
A metal solid made up of a cylindrical bar fixed onto a cube. The cylindrical bar fixed onto a cube. The cylindrical bar is 20 cm long and has a diameter of 7 cm. Each side of the cube is 9 cm long. The surface of the solid was painted. … 
math
A cylindrical piece of wood of radius 4.2 cm and length 150 cm is cut length rise into two equal pieces. Calculate the surface area of one piece 
Technical writing
Arrange "A Wooden Lead Pencil" stepbystep 1. Typically, a wooden lead pencil is about 0.8 cm in diameter and about 19 cm long. 2. The shape of the wooden lead pencil resembles that of a piece of dowel, or the shaft of an arrow, with … 
Maths
A cylindrical birthday cake of radius 23cm and height 12cm is to be shared equally among 18 people at a party,the piece of cake was shaped as AOB to give 20 degrees,hence prove that.Also calculate the area of cylindrical cake.