Homework Help: physics

Posted by suhani on Saturday, February 16, 2013 at 6:14am.

A cylindrical tube open at both ends is made of metal. The internal diameter of the tube is 11.2 cm and its length is 21 cm. The metal every where is 0.4 cm thick. Calculate the volume of the metal correct to 1 place of decimal

physics - Henry, Sunday, February 17, 2013 at 12:41pm
Outer Dia. = 11.2 + 2*0.4 = 12 cm.

V = pi*r^2 * h.
V = 3.14*6^2 * 21 = 2373.8 cm^3.

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