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Q20: Answers – Paper 2 – November 2018
Q20: Answers – Paper 2 – November 2018
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Here is a frustum of a cone.
Here is a frustum of a cone.
The diagram shows that the frustum is made by removing a cone with height 3.2 cm from a solid cone with height 6.4 cm and base diameter 7.2 cm.
The frustum is joined to a solid hemisphere of diameter 7.2 cm to form the solid S shown below.
The frustum is joined to a solid hemisphere of diameter 7.2 cm to form the solid S shown below.
The density of the frustum is 2.4 g/cm3
The density of the hemisphere is 4.8 g/cm3
Calculate the average density of solid S.
Question
The diagram shows that the frustum is made by removing a cone with height 3.2 cm from a solid cone with height 6.4 cm and base diameter 7.2 cm.
The frustum is joined to a solid hemisphere of diameter 7.2 cm to form the solid S shown below.
The frustum is joined to a solid hemisphere of diameter 7.2 cm to form the solid S shown below.
The density of the frustum is 2.4 g/cm3
The density of the hemisphere is 4.8 g/cm3
Calculate the average density of solid S.
................................... g/cm3
[5 marks]