Homework Help: maths

Posted by chaithu on Thursday, November 8, 2012 at 10:18am.

A metal pipe is 63cm long. Inner diameter of a cross section is 6m and the outer diameter is 8cm find:-surface area of the base a , surface area of the base b , the outer curved surface area inner curved surface area total surface area

maths - Steve, Thursday, November 8, 2012 at 10:30am
area of base: pi(8^2-6^2) = 28pi
outer area: 2pi*8*63 = 1008pi
inner area: 2pi*6*63 = 756pi

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