A hollow wooden cylinder has a thickness of 1.5 cm. It is 28 cm long and has an outer radius of 5.5 cm. Find the volume of oil it can hold.
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Explanation:
Inner radius=5.5㎝
Thickness=1.5㎝
Outer radius=5.5+1.5=7㎝
Volume of wood required=π(R
2
−r
2
)×h
=
7
22
(7
2
−(5.5)
2
)×28
=88(49−30.25)
=1650㎤
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