Question

Can someone please solve this question…

Answer 1

Given:

• Height of the cylindrical pipe = 420 cm

• External radius, R = d/2 = 8/2 = 4 cm

• Internal radius, r = d/2 = 6/2 = 3 cm

To find:

Find the volume of the copper used in making the pipe?

Formula used:

Volume of a hollow cylinder = π ( R² - r² ) h

Solution:

We know that,

Volume of copper used in making the pipe = π ( R² - r² ) h

= 22/7 ( 4² - 3² ) × 420

= 22/7 ( 16 - 9 ) × 420

= 22/7 × 7 × 420

= 22 × 420

= 9240 cm³