Question

11 The internal and external diameter of steel pipe of
length 140 cm are 8 cm and 10 cm, respectively.
Then, find the volume of steel.
NO SPAM ANSWERS.​

Answer 1

Answer:1cm

Step-by-step explanation:

Length of pipe = 140cm

External diameter =10cm

External Radius (r1) =5cm

Internal diameter =8cm

Internal Radius (r2) =4cm

So volume of steel = volume of pipe with external diameter - volume of pipe with internal diameter

(volume of pipe = pi r² h)

=3960cm³

Thickness of the metal = (external Radius - internal Radius)

=5-4

=1cm