Question

The external radius of a 14 cm long metallic pipe is 9 cm and the pipe is 1 cm thick find the volume of the metal used in the five if the mass of 1 cm cube metal is 8.5 gram find the mass of the pipe

Answer 1

Answer:

The volume and mass of pipe is $763.714 cm^3$ and 6.49 kg respectively.

Step-by-step explanation:

Given The external radius of a 14 cm long metallic pipe is 9 cm and the pipe is 1 cm thick. we have to find the volume and also the mass of metallic pipe if the mass of 1 cm cube metal is 8.5 gram.

External radius=14 cm

Internal radius=External radius - thickness=14-1=13 cm

Volume of metal pipe=$\pi R^{2}h-\pi r^{2}h$

                                   = $\pi h(R^{2}-r^{2})$

                                   = $\frac{22}{7}\times 9(14^2-13^2)$

                                   = $\frac{22}{7}\times 9(196-169)$

                                   = $763.714 cm^3$

The mass of $1 cm^3$ metal is 8.5 gram

∴ The mass of $763.714 cm^3$ metal is  $763.714\times 8.5=6,491.57 g=6.49 kg$

Answer 2

Answer:

Step-by-step explanation: