Question

The inner diameter of a cylindrical iron pipe is 15 cm and its outer diameter is 29 cm. The length of the iron pipe is 30 cm. Find the volume of the material used. Use π = 3.14.

Answer 1

Answer:

Find the radius:

r1 = 28 ÷ 2 = 14 cm

r2 = 24 ÷ 2 = 12 cm

Find the volume of the wood:

Volume =  πh(r1² - r2²)

Volume =  π(35)(14² - 12²)

Volume = 5720 cm³

Find the mass of the pipe:

1 cm³ = 0.6g

5720 cm³ = 0.6 x 5720 = 3432g or 3.432 kg

Answer: The mass is 3.432kg

Step-by-step explanation: