A hollow metal pipe has an external radius of 5cm and an internal radius of of 4.5cm. If the pipe is 1m long, find the volume of the metal used to make the pipe.
I am really confused how to begin to solve this, can someone help please?
 👍
 👎
 👁
 ℹ️
 🚩
2 answers

Take the total volume of the pipe (the full radius of 5cm) and you will have to find the volume of the smaller pipe size with radius 4.5 cm
Volume of metal = total volume of large pipe  (volume of internal pipe with radius 4.5 cm)
So in conclusion... find both volumes then take the smaller volume away from the larger one :) 👍
 👎
 ℹ️
 🚩

Do you subtract it.
 👍
 👎
 ℹ️
 🚩
Answer this Question
Related Questions

Math
A quartercircle with radius $5$ is drawn. A circle is drawn inside the sector, which is tangent to the sides of the sector, as shown. Find the radius of the inscribed circle. The rest is in asymptote size( 100 ) ; // Not to scale. Don't try anything here,

math
An arc AB of length 5cm is marked an a circle of radius 3cm. Find the area of the sector bounded by this arc and the radii from A and B.

Science
Am I right? What is the term for changes in the internal or external environment that cause a response A: signals B: messages ^^^^^^ C:Stimuli D:Nerves

Physics
2. A pool has an area A = 50 m2 and depth h = 2.5 m. The pool is filled with water to the maximum height. An electrical pump is used to empty the pool. There are two pipes coming out the pump: one is submerged into water has a radius r1 = 4 cm the other

calculus
Sand is poured at the rate of 10 m cube /min so as to form a conical pile whose altitude is always equal to the radius of its base a) How fast is the radius increasing when it is 5 meters? b) Find the rate at which the area of its base is increasing when

Physics E&M
A Geiger counter detects radiation such as alpha particles by using the fact that the radiation ionizes the air along its path. A thin wire lies on the axis of a hollow metal cylinder and is insulated from it. View Figure A large potential difference is

Algebra
This diagram shows a solid metal cylinder. The cylinder hasbase radius 2x and height 9x. The cylinder is melted down and made into a sphere of radius r Find an expression for in terms of x

Mathematics
A cylindrical pipe 28m long. Its internal radius is 3.5cm and external radius is 5cm. Calculate the volume in cm of metal used in making the pipe (2) the volume of water in metres that the pipe can hold.

Math
Someone please help,I have to sleep just 2 questions idk how to do 6. The diagram shows the cross section of a cylindrical pipe with water lying in the bottom. (Since I can't post picture here) The diagram: ◒ a) If the maximum depth of the water is 2cm

calculus
1. The radius of a sphere is r inches at time t seconds. Find the radius when the rates of increase of the surface area and the radius are numerically equal. A 1/4π in B 1/5π in C 1/3π in D 1/8π in E 1/2π in

maths
An open rectangular box has internal dimensions 2m long, 20cm wide and 22.5cm deep. If the box is made of wood 2.5cm thick, calculate the volume of the wood in cm cube.

physics
A long, thin straight wire with linear charge density λ runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2λ. Assume λ is positive. Find expressions for the electric field at the following

Trigonometry
A point on the rim of a wheel of unknown radius in a pulley system has a velocity of 16 in/min. The wheel is making 4 rpm. If the radius of the other wheel is 8 inches, find the 8" wheel's rpms and the unknown wheel's radius. I got a radius of about 0.637"

Physics
A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38

Physics
The pressure of water flowing through a 6.5×10−2−m radius pipe at a speed of 1.8m/s is 2.2 × 105 N/m2 What is the flow rate of the water? What is the pressure in the water after it goes up a 5.2−m high hill and flows in a 5.0×10−2−m radius

calculus (please help. URGENT!)
A hemispherical tank with a radius of 10m is filled from an input pipe at a rate of 3m^3/min. How fast is the water level rising when the water level is 5m from the bottom of the tank? (hint: the volume of the cap of thickness of h sliced from a sphere of

physics
A spiral spring loaded with a piece of metal, extends by 10.5cm in air, when the metal is fully submerged in water, the springs extends by 6.8cm. Calculate the relative density of the metal (assume Hook’s law is Obeyed). (4mks)

Physics
Assume the length of an organ pipe is L=24cm. You have excited the wave in the tube, and you observe that it has displacement nodes at 4cm, 12cm, and 20cm measured from one end of the pipe. In which harmonic, n, is the air in the pipe oscillating? What is

AP Chemistry
Titanium metal has a bodycentered cubic unit cell. The density of Titanium is 4.50 g/cm^3. Calculate the edge length of the unit cell and a value for the atomic radius of titanium. Ok, I know how to find the density using the atomic radius, but I'm having

math
A cylinder of radius 14 cm contains water. A metal solid cone of base radius 7 cm and height 18cm is submerged into the water. Find the change in height of the water level in the cylinder
Still need help?
You can ask a new question or browse existing questions.