Question

the length of a metalic pipe is 70cm inner diameter is 10cm and thickness is 5mm if density of metal used is 8g/cm3 then find mass of the pipe ​u

Answer 1

inner radius=10/2=5

length=70cm

thickness=5mm=0.5cm

density=8

$inner \: radius = \frac{22}{7} \times 5 \times 5 \times 70 \\ \: \: \: \: \: \: = 5500 {cm}^{3 } \\ outer \: radius = 5.5cm \\ outer \: vol = \frac{22}{7 } \times 5.5 \times 5.5 \times 70 \\ = 6655 {cm}^{3} \\ vol \: of \: metal = 6655 - 5500 \\ = 1155 {cm}^{3} \\ \\ mass = density \times vol \\ = 1155 \times 8 \\ 9240g \: \: \: \: \: \: \: answer \\ \\ \\ \\ i \: hope \: it \: will \: clear \: your \: dought$