Find the mass of a cylindrical iron pipe 3.5cm long and 18cm in external diameter,if the metal is 1cm thick and of density 10.2g/cm³ (take pie=22/7).

AAAaannndd the bot gets it wrong yet again!

mass = volume * density
= π*(9^2-8^2)*3.5 cm^3 * 10.2g/cm^3 = 1906.63 g

Mass = (π x (18/2)² x 10.2 x 3.5) g = 8,945.2 g

Did you know?

Did you know that you can determine the mass of a cylindrical iron pipe by considering its dimensions and the density of the metal? For instance, if we have a pipe that is 3.5cm long and has an external diameter of 18cm, with a metal thickness of 1cm and a density of 10.2g/cm³, we can calculate its mass. By using the formula for the volume of a cylinder, V = πr²h, where r is the radius and h is the height, we find that the internal radius is 16.5cm and the external radius is 17.5cm. Using these values, we can determine the volume of the metal in the pipe, which happens to be the difference in volume between the external and internal cylinders. By applying the formula V = π(R² - r²)h, where R is the external radius and r is the internal radius, we find a volume of 38.5π cm³. With the given density, we can multiply the volume by the density to obtain the mass of the pipe, which measures approximately 12222g or 12.22kg.