A hollow cylinder has height 90 cm and the outer curved surface area i – McqOptions

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1.	A hollow cylinder has height 90 cm and the outer curved surface area is 11880 cm2. It can hold 55440 cm3 of air inside it. What is the thickness (in cm) of this cylinder?
A.	10.5
B.	14
C.	7
D.	3.5
Answer» D. 3.5

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