Answer :

Given,


length of cylindrical tube = 14 cm


Difference between inside and outside surface = 88 cm2


volume of cylinder = 176 cm3


let outer radius of tube = R cm


Let inner radius of tube = r cm


so,


=


=


dividing equation (i) by equation (ii)


=


=


= R+r = 4 ..................(iii)


from equation (ii)


=


=


=


from equation (iii) and (iv)


= 2R = 5


= R =


= r = 1.5 cm


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