SOLUTION: A cylindrical mettalic pipe is 21cm long.The difference between outside and inside surface area is 44 cm². If the pipe is made up of 110 cm of metal. Find the inner and outer diame
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Question 1069067: A cylindrical mettalic pipe is 21cm long.The difference between outside and inside surface area is 44 cm². If the pipe is made up of 110 cm of metal. Find the inner and outer diameter of pipe.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The formula for outside surface area is
The inside surface area is:
-------------------------------
The difference of the surface areas is equal to
(1) cm2
--------------------------------------------
The volume of the metal is
[ vol of outside cylinder ] minus [ vol of the hollow part ]
You are given that:
(2) cm3
------------------------------------------
(1)
(1)
(1)
and
(2)
(2)
(2)
(2)
(2)
(2)
(2)
and
(1)
(1)
(1)
------------------------------------------
Outside diameter =
cm
Inside diameter =
cm
--------------------------
check answers:
(1)
(1)
(1)
(1)
(1)
close enough
(2)
(2)
(2)
(2)
(2)
(2)
close enough
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