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A hollow cylindrical tube open at both ends is made of iron 3 cm thick. if the external diameter be 56 cm n the length of the tube be 182 cm, find the number of cubic cm in it.

1
by preet2002

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by preet2002

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R=external diameter=56cm

r=internal diameter=external diameter - thickness=56-3=53cm

h=length=182cm

22/7*182*(56sq.-53sq.)

=22*6(56+53)(56-53)

=43164cu.cm