Post a New Question

maths

posted by on .

What length of a solid cylinder 2cm in diameter must be taken to recast into hollow cylinder of length 16cm,external diameter 2cm and thickness 2.5mm?

  • maths - ,

    for the hollow cylinder,

    outside volume is pi * 1^2 * 16 = 16pi
    inside volume = pi * (1-.25)^2 * 16 = 9pi

    volume of metal = 7pi cm^3

    volume of solid is thus

    7pi = pi * 1^2 * h = h*pi
    h = 7 cm

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question