Question

a hollow cylindrical pipe is 28 along its inner and Outer diameter are 6 cm and 12 CM respectively find the volume of the metal used in the making of pipe​

Answer 1

Step-by-step explanation:

⇒ Height of cylinder = 28 m = 2800 cm

⇒ Inner diameter of cylinder = 6 cm

⇒ Inner Radius of cylinder (r) = 3 cm

⇒ Outer diameter of cylinder = 12 cm

⇒ Outer radius of cylinder (R) = 6 cm

Volume of hollow cylindrical pipe = π ( R² - r² ) h

⇒ π ( ( 12/ 2)² - ( 6 / 2 ) ² ) 2800 cm³

⇒ 22 / 7 × ( 36 - 9 ) × 2800 cm³

⇒ 22 × 400 × 25 cm³

⇒ 22 × 10000 cm³

⇒ 2,20,000 cm³ .

Therefore , Volume of hollow cylindrical pipe is 2,20,000 cm³ .